64818572 has 36 divisors (see below), whose sum is σ = 142107840. Its totient is φ = 25641504.

The previous prime is 64818571. The next prime is 64818643. The reversal of 64818572 is 27581846.

It is a super-2 number, since 2×64818572² = 8402894552238368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64818571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10172 + ... + 15267.

It is an arithmetic number, because the mean of its divisors is an integer number (3947440).

Almost surely, 2^64818572 is an apocalyptic number.

It is an amenable number.

64818572 is an abundant number, since it is smaller than the sum of its proper divisors (77289268).

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

64818572 is a wasteful number, since it uses less digits than its factorization.

64818572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25470 (or 25461 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 64818572 is about 8050.9981989813. The cubic root of 64818572 is about 401.6981389418.

The spelling of 64818572 in words is "sixty-four million, eight hundred eighteen thousand, five hundred seventy-two".