55400564 has 12 divisors (see below), whose sum is σ = 97133988. Its totient is φ = 27648000.

The previous prime is 55400563. The next prime is 55400573. The reversal of 55400564 is 46500455.

55400564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 44890000 + 10510564 = 6700^2 + 3242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10637 + ... + 14964.

It is an arithmetic number, because the mean of its divisors is an integer number (8094499).

Almost surely, 2^55400564 is an apocalyptic number.

It is an amenable number.

55400564 is a deficient number, since it is larger than the sum of its proper divisors (41733424).

55400564 is a wasteful number, since it uses less digits than its factorization.

55400564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26146 (or 26144 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 55400564 is about 7443.1555136246. The cubic root of 55400564 is about 381.2162416046.

The spelling of 55400564 in words is "fifty-five million, four hundred thousand, five hundred sixty-four".