156746994181 has 32 divisors (see below), whose sum is σ = 171509022720. Its totient is φ = 142705929600.

The previous prime is 156746994167. The next prime is 156746994251. The reversal of 156746994181 is 181499647651.

It is not a de Polignac number, because 156746994181 - 2⁵ = 156746994149 is a prime.

It is a super-2 number, since 2×156746994181² (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 (156740994181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105410820 + ... + 105412306.

It is an arithmetic number, because the mean of its divisors is an integer number (5359656960).

Almost surely, 2^156746994181 is an apocalyptic number.

It is an amenable number.

156746994181 is a deficient number, since it is larger than the sum of its proper divisors (14762028539).

156746994181 is a wasteful number, since it uses less digits than its factorization.

156746994181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665.

The product of its digits is 13063680, while the sum is 61.

The spelling of 156746994181 in words is "one hundred fifty-six billion, seven hundred forty-six million, nine hundred ninety-four thousand, one hundred eighty-one".