64553856 has 32 divisors (see below), whose sum is σ = 171472200. Its totient is φ = 21517824.

The previous prime is 64553837. The next prime is 64553861. The reversal of 64553856 is 65835546.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83671 + ... + 84438.

Almost surely, 2^64553856 is an apocalyptic number.

It is an amenable number.

64553856 is an abundant number, since it is smaller than the sum of its proper divisors (106918344).

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

64553856 is a wasteful number, since it uses less digits than its factorization.

64553856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168126 (or 168114 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The square root of 64553856 is about 8034.5414305983. The cubic root of 64553856 is about 401.1505540570.

The spelling of 64553856 in words is "sixty-four million, five hundred fifty-three thousand, eight hundred fifty-six".