165680895042431 has 16 divisors (see below), whose sum is σ = 168886395595008. Its totient is φ = 162508382280000.

The previous prime is 165680895042413. The next prime is 165680895042437. The reversal of 165680895042431 is 134240598086561.

It is a cyclic number.

It is not a de Polignac number, because 165680895042431 - 2¹⁰ = 165680895041407 is a prime.

It is a super-2 number, since 2×165680895042431² (a number of 29 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 (165680895042437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6306806 + ... + 19264931.

It is an arithmetic number, because the mean of its divisors is an integer number (10555399724688).

Almost surely, 2^{165680895042431} is an apocalyptic number.

165680895042431 is a deficient number, since it is larger than the sum of its proper divisors (3205500552577).

165680895042431 is a wasteful number, since it uses less digits than its factorization.

165680895042431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25572382.

The product of its (nonzero) digits is 49766400, while the sum is 62.

The spelling of 165680895042431 in words is "one hundred sixty-five trillion, six hundred eighty billion, eight hundred ninety-five million, forty-two thousand, four hundred thirty-one".