53664520 has 128 divisors (see below), whose sum is σ = 155312640. Its totient is φ = 16220160.

The previous prime is 53664517. The next prime is 53664539. The reversal of 53664520 is 2546635.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83400 + ... + 84040.

It is an arithmetic number, because the mean of its divisors is an integer number (1213380).

Almost surely, 2^53664520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53664520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77656320).

53664520 is an abundant number, since it is smaller than the sum of its proper divisors (101648120).

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

53664520 is a wasteful number, since it uses less digits than its factorization.

53664520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 53664520 is about 7325.6071420736. The cubic root of 53664520 is about 377.1919507891.

It can be divided in two parts, 536 and 64520, that added together give a palindrome (65056).

The spelling of 53664520 in words is "fifty-three million, six hundred sixty-four thousand, five hundred twenty".