64581612 has 24 divisors (see below), whose sum is σ = 150876096. Its totient is φ = 21500688.

The previous prime is 64581607. The next prime is 64581617. The reversal of 64581612 is 21618546.

It is an interprime number because it is at equal distance from previous prime (64581607) and next prime (64581617).

It is not an unprimeable number, because it can be changed into a prime (64581617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8523 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (6286504).

Almost surely, 2^64581612 is an apocalyptic number.

It is an amenable number.

64581612 is an abundant number, since it is smaller than the sum of its proper divisors (86294484).

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

64581612 is a wasteful number, since it uses less digits than its factorization.

64581612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637 (or 6635 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 64581612 is about 8036.2685370761. The cubic root of 64581612 is about 401.2080395947.

The spelling of 64581612 in words is "sixty-four million, five hundred eighty-one thousand, six hundred twelve".