55578656 has 24 divisors (see below), whose sum is σ = 125052480. Its totient is φ = 23819328.

The previous prime is 55578619. The next prime is 55578671. The reversal of 55578656 is 65687555.

It is a self number, because there is not a number n which added to its sum of digits gives 55578656.

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, 123836 + ... + 124283.

It is an arithmetic number, because the mean of its divisors is an integer number (5210520).

Almost surely, 2^55578656 is an apocalyptic number.

55578656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55578656 is an abundant number, since it is smaller than the sum of its proper divisors (69473824).

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

55578656 is a wasteful number, since it uses less digits than its factorization.

55578656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248136 (or 248128 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 47.

The square root of 55578656 is about 7455.1093888688. The cubic root of 55578656 is about 381.6242936714.

The spelling of 55578656 in words is "fifty-five million, five hundred seventy-eight thousand, six hundred fifty-six".