64557408 has 24 divisors (see below), whose sum is σ = 169463448. Its totient is φ = 21519104.

The previous prime is 64557401. The next prime is 64557419. The reversal of 64557408 is 80475546.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64557401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336141 + ... + 336332.

It is an arithmetic number, because the mean of its divisors is an integer number (7060977).

Almost surely, 2^64557408 is an apocalyptic number.

It is an amenable number.

64557408 is an abundant number, since it is smaller than the sum of its proper divisors (104906040).

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

64557408 is a wasteful number, since it uses less digits than its factorization.

64557408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672486 (or 672478 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 64557408 is about 8034.7624731538. The cubic root of 64557408 is about 401.1579115345.

The spelling of 64557408 in words is "sixty-four million, five hundred fifty-seven thousand, four hundred eight".