64631450 has 48 divisors (see below), whose sum is σ = 137100600. Its totient is φ = 22456320.

The previous prime is 64631447. The next prime is 64631471. The reversal of 64631450 is 5413646.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 935089 + 63696361 = 967^2 + 7981^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8126 + ... + 13974.

Almost surely, 2^64631450 is an apocalyptic number.

64631450 is an abundant number, since it is smaller than the sum of its proper divisors (72469150).

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

64631450 is a wasteful number, since it uses less digits than its factorization.

64631450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64631450 is about 8039.3687563141. The cubic root of 64631450 is about 401.3112179057.

The spelling of 64631450 in words is "sixty-four million, six hundred thirty-one thousand, four hundred fifty".