156861564123 has 12 divisors (see below), whose sum is σ = 229890777704. Its totient is φ = 95067614400.

The previous prime is 156861564107. The next prime is 156861564131. The reversal of 156861564123 is 321465168651.

It is not a de Polignac number, because 156861564123 - 2⁴ = 156861564107 is a prime.

It is a super-2 number, since 2×156861564123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156861564103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216062398 + ... + 216063123.

Almost surely, 2^156861564123 is an apocalyptic number.

156861564123 is a deficient number, since it is larger than the sum of its proper divisors (73029213581).

156861564123 is a wasteful number, since it uses less digits than its factorization.

156861564123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432125546 (or 432125535 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The spelling of 156861564123 in words is "one hundred fifty-six billion, eight hundred sixty-one million, five hundred sixty-four thousand, one hundred twenty-three".