155855128 has 32 divisors (see below), whose sum is σ = 343319760. Its totient is φ = 65393280.

The previous prime is 155855123. The next prime is 155855129. The reversal of 155855128 is 821558551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155855123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66975 + ... + 69262.

Almost surely, 2^155855128 is an apocalyptic number.

It is an amenable number.

155855128 is an abundant number, since it is smaller than the sum of its proper divisors (187464632).

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

155855128 is a wasteful number, since it uses less digits than its factorization.

155855128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136267 (or 136263 counting only the distinct ones).

The product of its digits is 80000, while the sum is 40.

The square root of 155855128 is about 12484.1951282411. The cubic root of 155855128 is about 538.1545692606.

The spelling of 155855128 in words is "one hundred fifty-five million, eight hundred fifty-five thousand, one hundred twenty-eight".