64501620 has 24 divisors (see below), whose sum is σ = 180604704. Its totient is φ = 17200416.

The previous prime is 64501609. The next prime is 64501663. The reversal of 64501620 is 2610546.

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, 537454 + ... + 537573.

It is an arithmetic number, because the mean of its divisors is an integer number (7525196).

Almost surely, 2^64501620 is an apocalyptic number.

64501620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64501620 is an abundant number, since it is smaller than the sum of its proper divisors (116103084).

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

64501620 is a wasteful number, since it uses less digits than its factorization.

64501620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075039 (or 1075037 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 64501620 is about 8031.2900582659. The cubic root of 64501620 is about 401.0423232133.

The spelling of 64501620 in words is "sixty-four million, five hundred one thousand, six hundred twenty".