64650520 has 32 divisors (see below), whose sum is σ = 158688720. Its totient is φ = 23509120.

The previous prime is 64650517. The next prime is 64650533. The reversal of 64650520 is 2505646.

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, 73027 + ... + 73906.

Almost surely, 2^64650520 is an apocalyptic number.

It is an amenable number.

64650520 is an abundant number, since it is smaller than the sum of its proper divisors (94038200).

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

64650520 is a wasteful number, since it uses less digits than its factorization.

64650520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146955 (or 146951 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 64650520 is about 8040.5547072326. The cubic root of 64650520 is about 401.3506839983.

The spelling of 64650520 in words is "sixty-four million, six hundred fifty thousand, five hundred twenty".