155188656 has 320 divisors, whose sum is σ = 557900800. Its totient is φ = 40310784.

The previous prime is 155188639. The next prime is 155188661. The reversal of 155188656 is 656881551.

155188656 is a `hidden beast` number, since 1 + 5 + 518 + 86 + 56 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2125836 + ... + 2125908.

It is an arithmetic number, because the mean of its divisors is an integer number (1743440).

Almost surely, 2^155188656 is an apocalyptic number.

155188656 is a gapful number since it is divisible by the number (16) 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 155188656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278950400).

155188656 is an abundant number, since it is smaller than the sum of its proper divisors (402712144).

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

155188656 is a wasteful number, since it uses less digits than its factorization.

155188656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 141 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 155188656 is about 12457.4739012370. The cubic root of 155188656 is about 537.3863827636.

The spelling of 155188656 in words is "one hundred fifty-five million, one hundred eighty-eight thousand, six hundred fifty-six".