161556627235075 has 24 divisors (see below), whose sum is σ = 201216611382080. Its totient is φ = 128673499968000.

The previous prime is 161556627235039. The next prime is 161556627235097. The reversal of 161556627235075 is 570532726655161.

It is not a de Polignac number, because 161556627235075 - 2⁴⁵ = 126372255146243 is a prime.

It is a super-2 number, since 2×161556627235075² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99675547 + ... + 101283403.

Almost surely, 2^{161556627235075} is an apocalyptic number.

161556627235075 is a deficient number, since it is larger than the sum of its proper divisors (39659984147005).

161556627235075 is a wasteful number, since it uses less digits than its factorization.

161556627235075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625647 (or 1625642 counting only the distinct ones).

The product of its (nonzero) digits is 79380000, while the sum is 61.

The spelling of 161556627235075 in words is "one hundred sixty-one trillion, five hundred fifty-six billion, six hundred twenty-seven million, two hundred thirty-five thousand, seventy-five".