168890587369 has 15 divisors (see below), whose sum is σ = 197050789757. Its totient is φ = 144746100156.

The previous prime is 168890587363. The next prime is 168890587373. The reversal of 168890587369 is 963785098861.

The square root of 168890587369 is 410963.

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

It is not a de Polignac number, because 168890587369 - 2¹⁵ = 168890554601 is a prime.

It is a super-2 number, since 2×168890587369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168890587298 and 168890587307.

It is not an unprimeable number, because it can be changed into a prime (168890587363) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 20132994 + ... + 20141380.

Almost surely, 2^168890587369 is an apocalyptic number.

168890587369 is the 410963-rd square number.

168890587369 is the 205482-nd centered octagonal number.

It is an amenable number.

168890587369 is a deficient number, since it is larger than the sum of its proper divisors (28160202388).

168890587369 is an frugal number, since it uses more digits than its factorization.

168890587369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16802 (or 8394 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 168890587369 in words is "one hundred sixty-eight billion, eight hundred ninety million, five hundred eighty-seven thousand, three hundred sixty-nine".