55478764 has 12 divisors (see below), whose sum is σ = 105914088. Its totient is φ = 25217600.

The previous prime is 55478749. The next prime is 55478767. The reversal of 55478764 is 46787455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55478767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630397 + ... + 630484.

It is an arithmetic number, because the mean of its divisors is an integer number (8826174).

Almost surely, 2^55478764 is an apocalyptic number.

It is an amenable number.

55478764 is a deficient number, since it is larger than the sum of its proper divisors (50435324).

55478764 is a wasteful number, since it uses less digits than its factorization.

55478764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260896 (or 1260894 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 55478764 is about 7448.4068095130. The cubic root of 55478764 is about 381.3955243437.

The spelling of 55478764 in words is "fifty-five million, four hundred seventy-eight thousand, seven hundred sixty-four".