64566639052 has 12 divisors (see below), whose sum is σ = 113749952400. Its totient is φ = 32066652656.

The previous prime is 64566639037. The next prime is 64566639061. The reversal of 64566639052 is 25093666546.

64566639052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54166048 + ... + 54167239.

It is an arithmetic number, because the mean of its divisors is an integer number (9479162700).

Almost surely, 2^64566639052 is an apocalyptic number.

It is an amenable number.

64566639052 is a deficient number, since it is larger than the sum of its proper divisors (49183313348).

64566639052 is a wasteful number, since it uses less digits than its factorization.

64566639052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108333440 (or 108333438 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 64566639052 in words is "sixty-four billion, five hundred sixty-six million, six hundred thirty-nine thousand, fifty-two".