55740564 has 36 divisors (see below), whose sum is σ = 153709920. Its totient is φ = 16890960.

The previous prime is 55740563. The next prime is 55740589. The reversal of 55740564 is 46504755.

It is a happy number.

55740564 is a `hidden beast` number, since 5 + 57 + 40 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55740563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69984 + ... + 70775.

It is an arithmetic number, because the mean of its divisors is an integer number (4269720).

Almost surely, 2^55740564 is an apocalyptic number.

It is an amenable number.

55740564 is an abundant number, since it is smaller than the sum of its proper divisors (97969356).

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

55740564 is a wasteful number, since it uses less digits than its factorization.

55740564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140780 (or 140775 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 55740564 is about 7465.9603534977. The cubic root of 55740564 is about 381.9945084780.

The spelling of 55740564 in words is "fifty-five million, seven hundred forty thousand, five hundred sixty-four".