161613025527 has 16 divisors (see below), whose sum is σ = 216435732480. Its totient is φ = 107267215200.

The previous prime is 161613025411. The next prime is 161613025529. The reversal of 161613025527 is 725520316161.

It is not a de Polignac number, because 161613025527 - 2⁸ = 161613025271 is a prime.

It is a super-2 number, since 2×161613025527² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161613025529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488877 + ... + 749817.

It is an arithmetic number, because the mean of its divisors is an integer number (13527233280).

Almost surely, 2^161613025527 is an apocalyptic number.

161613025527 is a deficient number, since it is larger than the sum of its proper divisors (54822706953).

161613025527 is a wasteful number, since it uses less digits than its factorization.

161613025527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261854.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 161613025527 in words is "one hundred sixty-one billion, six hundred thirteen million, twenty-five thousand, five hundred twenty-seven".