156207991940 has 576 divisors, whose sum is σ = 480235123200. Its totient is φ = 41385738240.

The previous prime is 156207991939. The next prime is 156207991967. The reversal of 156207991940 is 49199702651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 154814156 + ... + 154815164.

Almost surely, 2^156207991940 is an apocalyptic number.

156207991940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156207991940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240117561600).

156207991940 is an abundant number, since it is smaller than the sum of its proper divisors (324027131260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156207991940 is a wasteful number, since it uses less digits than its factorization.

156207991940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 156207991940 in words is "one hundred fifty-six billion, two hundred seven million, nine hundred ninety-one thousand, nine hundred forty".