80138668501 has 8 divisors (see below), whose sum is σ = 80201250360. Its totient is φ = 80076115392.

The previous prime is 80138668433. The next prime is 80138668517. The reversal of 80138668501 is 10586683108.

It can be written as a sum of positive squares in 4 ways, for example, as 193933476 + 79944735025 = 13926^2 + 282745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80138668501 - 2³¹ = 77991184853 is a prime.

It is a super-2 number, since 2×80138668501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80138668531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10924831 + ... + 10932163.

It is an arithmetic number, because the mean of its divisors is an integer number (10025156295).

Almost surely, 2^80138668501 is an apocalyptic number.

It is an amenable number.

80138668501 is a deficient number, since it is larger than the sum of its proper divisors (62581859).

80138668501 is a wasteful number, since it uses less digits than its factorization.

80138668501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14375.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 80138668501 in words is "eighty billion, one hundred thirty-eight million, six hundred sixty-eight thousand, five hundred one".