53661604 has 12 divisors (see below), whose sum is σ = 94124800. Its totient is φ = 26768808.

The previous prime is 53661593. The next prime is 53661607. The reversal of 53661604 is 40616635.

It is not an unprimeable number, because it can be changed into a prime (53661607) 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, 13524 + ... + 17035.

Almost surely, 2^53661604 is an apocalyptic number.

It is an amenable number.

53661604 is a deficient number, since it is larger than the sum of its proper divisors (40463196).

53661604 is a wasteful number, since it uses less digits than its factorization.

53661604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31002 (or 31000 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 53661604 is about 7325.4081114980. The cubic root of 53661604 is about 377.1851187664.

The spelling of 53661604 in words is "fifty-three million, six hundred sixty-one thousand, six hundred four".