64567972 has 24 divisors (see below), whose sum is σ = 136733184. Its totient is φ = 26044032.

The previous prime is 64567961. The next prime is 64567981. The reversal of 64567972 is 27976546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67348 + ... + 68299.

It is an arithmetic number, because the mean of its divisors is an integer number (5697216).

Almost surely, 2^64567972 is an apocalyptic number.

It is an amenable number.

64567972 is an abundant number, since it is smaller than the sum of its proper divisors (72165212).

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

64567972 is a wasteful number, since it uses less digits than its factorization.

64567972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135675 (or 135673 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The square root of 64567972 is about 8035.4198396848. The cubic root of 64567972 is about 401.1797918071.

The spelling of 64567972 in words is "sixty-four million, five hundred sixty-seven thousand, nine hundred seventy-two".