156133638 has 12 divisors (see below), whose sum is σ = 338289588. Its totient is φ = 52044540.

The previous prime is 156133631. The next prime is 156133643. The reversal of 156133638 is 836331651.

It is a happy number.

156133638 is a `hidden beast` number, since 1 + 5 + 6 + 13 + 3 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156133631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4337028 + ... + 4337063.

It is an arithmetic number, because the mean of its divisors is an integer number (28190799).

Almost surely, 2^156133638 is an apocalyptic number.

156133638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

156133638 is an abundant number, since it is smaller than the sum of its proper divisors (182155950).

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

156133638 is a wasteful number, since it uses less digits than its factorization.

156133638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674099 (or 8674096 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 156133638 is about 12495.3446531098. The cubic root of 156133638 is about 538.4749356614.

The spelling of 156133638 in words is "one hundred fifty-six million, one hundred thirty-three thousand, six hundred thirty-eight".