155638976 has 28 divisors (see below), whose sum is σ = 322277232. Its totient is φ = 74435328.

The previous prime is 155638939. The next prime is 155638979. The reversal of 155638976 is 679836551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155638979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51395 + ... + 54338.

Almost surely, 2^155638976 is an apocalyptic number.

155638976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155638976 is an abundant number, since it is smaller than the sum of its proper divisors (166638256).

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

155638976 is a wasteful number, since it uses less digits than its factorization.

155638976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105768 (or 105758 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 50.

The square root of 155638976 is about 12475.5350987443. The cubic root of 155638976 is about 537.9056693051.

The spelling of 155638976 in words is "one hundred fifty-five million, six hundred thirty-eight thousand, nine hundred seventy-six".