55640504 has 8 divisors (see below), whose sum is σ = 104325960. Its totient is φ = 27820248.

The previous prime is 55640477. The next prime is 55640509. The reversal of 55640504 is 40504655.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3477524 + ... + 3477539.

It is an arithmetic number, because the mean of its divisors is an integer number (13040745).

Almost surely, 2^55640504 is an apocalyptic number.

It is an amenable number.

55640504 is a deficient number, since it is larger than the sum of its proper divisors (48685456).

55640504 is a wasteful number, since it uses less digits than its factorization.

55640504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6955069 (or 6955065 counting only the distinct ones).

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

The square root of 55640504 is about 7459.2562631941. The cubic root of 55640504 is about 381.7657985307.

The spelling of 55640504 in words is "fifty-five million, six hundred forty thousand, five hundred four".