52661864 has 8 divisors (see below), whose sum is σ = 98741010. Its totient is φ = 26330928.

The previous prime is 52661857. The next prime is 52661867. The reversal of 52661864 is 46816625.

It can be written as a sum of positive squares in only one way, i.e., 41705764 + 10956100 = 6458^2 + 3310^2 .

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

It is not an unprimeable number, because it can be changed into a prime (52661867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3291359 + ... + 3291374.

Almost surely, 2^52661864 is an apocalyptic number.

It is an amenable number.

52661864 is a deficient number, since it is larger than the sum of its proper divisors (46079146).

52661864 is a wasteful number, since it uses less digits than its factorization.

52661864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582739 (or 6582735 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 52661864 is about 7256.8494541364. The cubic root of 52661864 is about 374.8280432351.

The spelling of 52661864 in words is "fifty-two million, six hundred sixty-one thousand, eight hundred sixty-four".