64454664 has 32 divisors (see below), whose sum is σ = 162321120. Its totient is φ = 21326976.

The previous prime is 64454653. The next prime is 64454683. The reversal of 64454664 is 46645446.

It is a super-2 number, since 2×64454664² = 8308807422705792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 6514 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (5072535).

Almost surely, 2^64454664 is an apocalyptic number.

It is an amenable number.

64454664 is an abundant number, since it is smaller than the sum of its proper divisors (97866456).

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

64454664 is a wasteful number, since it uses less digits than its factorization.

64454664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19749 (or 19745 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

The square root of 64454664 is about 8028.3662098836. The cubic root of 64454664 is about 400.9449824291.

The spelling of 64454664 in words is "sixty-four million, four hundred fifty-four thousand, six hundred sixty-four".