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80166003881209 = 29247265692
BaseRepresentation
bin10010001110100100011010…
…001011110011010011111001
3101111211210110122102221022121
4102032210122023303103321
541001414433443144314
6442255430451521241
722612542210615361
oct2216443213632371
9344753418387277
1080166003881209
11235a82362a40a4
128ba88605b9221
133596810c2636c
1415b20aba079a1
1594047d528d24
hex48e91a2f34f9

80166003881209 has 27 divisors (see below), whose sum is σ = 84842675521357. Its totient is φ = 75743282944448.

The previous prime is 80166003881207. The next prime is 80166003881221. The reversal of 80166003881209 is 90218830066108.

The square root of 80166003881209 is 8953547.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17596321871209 + 62569682010000 = 4194797^2 + 7910100^2 .

It is not a de Polignac number, because 80166003881209 - 21 = 80166003881207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80166003881207) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12203681277 + ... + 12203687845.

Almost surely, 280166003881209 is an apocalyptic number.

80166003881209 is the 8953547-th square number.

80166003881209 is the 4476774-th centered octagonal number.

It is an amenable number.

80166003881209 is a deficient number, since it is larger than the sum of its proper divisors (4676671640148).

80166003881209 is an frugal number, since it uses more digits than its factorization.

80166003881209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290 (or 6645 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 80166003881209 in words is "eighty trillion, one hundred sixty-six billion, three million, eight hundred eighty-one thousand, two hundred nine".

Divisors: 1 29 47 841 1363 2209 6569 39527 64061 190501 308743 1857769 5524529 8953547 14510921 43151761 259652863 420816709 1251401069 2028132767 12203684561 36290631001 58815850243 95322240049 1705659657047 2764344961421 80166003881209