155605656 has 32 divisors (see below), whose sum is σ = 395611200. Its totient is φ = 50988960.

The previous prime is 155605643. The next prime is 155605669. The reversal of 155605656 is 656506551.

It is an interprime number because it is at equal distance from previous prime (155605643) and next prime (155605669).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53530 + ... + 56361.

It is an arithmetic number, because the mean of its divisors is an integer number (12362850).

Almost surely, 2^155605656 is an apocalyptic number.

It is an amenable number.

155605656 is an abundant number, since it is smaller than the sum of its proper divisors (240005544).

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

155605656 is a wasteful number, since it uses less digits than its factorization.

155605656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109959 (or 109955 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 155605656 is about 12474.1996136025. The cubic root of 155605656 is about 537.8672806860.

The spelling of 155605656 in words is "one hundred fifty-five million, six hundred five thousand, six hundred fifty-six".