155400056 has 16 divisors (see below), whose sum is σ = 333000240. Its totient is φ = 66600000.

The previous prime is 155400017. The next prime is 155400061. The reversal of 155400056 is 650004551.

155400056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155399998 and 155400034.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387445 + ... + 1387556.

It is an arithmetic number, because the mean of its divisors is an integer number (20812515).

Almost surely, 2^155400056 is an apocalyptic number.

It is an amenable number.

155400056 is an abundant number, since it is smaller than the sum of its proper divisors (177600184).

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

155400056 is a wasteful number, since it uses less digits than its factorization.

155400056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775014 (or 2775010 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 155400056 is about 12465.9558799155. The cubic root of 155400056 is about 537.6302836157.

The spelling of 155400056 in words is "one hundred fifty-five million, four hundred thousand, fifty-six".