64642764 has 24 divisors (see below), whose sum is σ = 150963120. Its totient is φ = 21529024.

The previous prime is 64642763. The next prime is 64642771. The reversal of 64642764 is 46724646.

It is not an unprimeable number, because it can be changed into a prime (64642763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26542 + ... + 28874.

It is an arithmetic number, because the mean of its divisors is an integer number (6290130).

Almost surely, 2^64642764 is an apocalyptic number.

It is an amenable number.

64642764 is an abundant number, since it is smaller than the sum of its proper divisors (86320356).

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

64642764 is a wasteful number, since it uses less digits than its factorization.

64642764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649 (or 4647 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 64642764 is about 8040.0723877338. The cubic root of 64642764 is about 401.3346335968.

The spelling of 64642764 in words is "sixty-four million, six hundred forty-two thousand, seven hundred sixty-four".