64556480 has 56 divisors (see below), whose sum is σ = 162781488. Its totient is φ = 24301568.

The previous prime is 64556467. The next prime is 64556501. The reversal of 64556480 is 8465546.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 494 + ... + 11373.

Almost surely, 2^64556480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64556480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81390744).

64556480 is an abundant number, since it is smaller than the sum of its proper divisors (98225008).

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

64556480 is a wasteful number, since it uses less digits than its factorization.

64556480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11901 (or 11891 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 64556480 is about 8034.7047238838. The cubic root of 64556480 is about 401.1559893367.

The spelling of 64556480 in words is "sixty-four million, five hundred fifty-six thousand, four hundred eighty".