64631364 has 24 divisors (see below), whose sum is σ = 172350528. Its totient is φ = 18466080.

The previous prime is 64631363. The next prime is 64631377. The reversal of 64631364 is 46313646.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64631363) 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, 384627 + ... + 384794.

It is an arithmetic number, because the mean of its divisors is an integer number (7181272).

Almost surely, 2^64631364 is an apocalyptic number.

It is an amenable number.

64631364 is an abundant number, since it is smaller than the sum of its proper divisors (107719164).

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

64631364 is a wasteful number, since it uses less digits than its factorization.

64631364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769435 (or 769433 counting only the distinct ones).

The product of its digits is 31104, while the sum is 33.

The square root of 64631364 is about 8039.3634076337. The cubic root of 64631364 is about 401.3110399079.

The spelling of 64631364 in words is "sixty-four million, six hundred thirty-one thousand, three hundred sixty-four".