53500644 has 36 divisors (see below), whose sum is σ = 135488080. Its totient is φ = 17800560.

The previous prime is 53500633. The next prime is 53500661. The reversal of 53500644 is 44600535.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25599 + ... + 27609.

Almost surely, 2^53500644 is an apocalyptic number.

It is an amenable number.

53500644 is an abundant number, since it is smaller than the sum of its proper divisors (81987436).

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

53500644 is a wasteful number, since it uses less digits than its factorization.

53500644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2755 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 53500644 is about 7314.4134419651. The cubic root of 53500644 is about 376.8076140834.

The spelling of 53500644 in words is "fifty-three million, five hundred thousand, six hundred forty-four".