55136578 has 32 divisors (see below), whose sum is σ = 98233344. Its totient is φ = 22719312.

The previous prime is 55136567. The next prime is 55136579. The reversal of 55136578 is 87563155.

It is a self number, because there is not a number n which added to its sum of digits gives 55136578.

It is not an unprimeable number, because it can be changed into a prime (55136579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39651 + ... + 41017.

It is an arithmetic number, because the mean of its divisors is an integer number (3069792).

Almost surely, 2^55136578 is an apocalyptic number.

55136578 is a deficient number, since it is larger than the sum of its proper divisors (43096766).

55136578 is a wasteful number, since it uses less digits than its factorization.

55136578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486.

The product of its digits is 126000, while the sum is 40.

The square root of 55136578 is about 7425.4008645998. The cubic root of 55136578 is about 380.6097735323.

The spelling of 55136578 in words is "fifty-five million, one hundred thirty-six thousand, five hundred seventy-eight".