56155578 has 16 divisors (see below), whose sum is σ = 112384800. Its totient is φ = 18706256.

The previous prime is 56155543. The next prime is 56155591. The reversal of 56155578 is 87555165.

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, 15373 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (7024050).

Almost surely, 2^56155578 is an apocalyptic number.

56155578 is an abundant number, since it is smaller than the sum of its proper divisors (56229222).

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

56155578 is a wasteful number, since it uses less digits than its factorization.

56155578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141.

The product of its digits is 210000, while the sum is 42.

The square root of 56155578 is about 7493.7025561467. The cubic root of 56155578 is about 382.9402065873.

The spelling of 56155578 in words is "fifty-six million, one hundred fifty-five thousand, five hundred seventy-eight".