64075520 has 72 divisors (see below), whose sum is σ = 155188656. Its totient is φ = 25346048.

The previous prime is 64075507. The next prime is 64075549. The reversal of 64075520 is 2557046.

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, 144419 + ... + 144861.

It is an arithmetic number, because the mean of its divisors is an integer number (2155398).

Almost surely, 2^64075520 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 64075520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77594328).

64075520 is an abundant number, since it is smaller than the sum of its proper divisors (91113136).

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

64075520 is a wasteful number, since it uses less digits than its factorization.

64075520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 64075520 is about 8004.7186084209. The cubic root of 64075520 is about 400.1572714894.

The spelling of 64075520 in words is "sixty-four million, seventy-five thousand, five hundred twenty".