64641610 has 64 divisors (see below), whose sum is σ = 135146880. Its totient is φ = 22014720.

The previous prime is 64641607. The next prime is 64641611. The reversal of 64641610 is 1614646.

It is not an unprimeable number, because it can be changed into a prime (64641611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328032 + ... + 328228.

It is an arithmetic number, because the mean of its divisors is an integer number (2111670).

Almost surely, 2^64641610 is an apocalyptic number.

64641610 is an abundant number, since it is smaller than the sum of its proper divisors (70505270).

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

64641610 is a wasteful number, since it uses less digits than its factorization.

64641610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 64641610 is about 8040.0006218905. Note that the first 3 decimals coincide. The cubic root of 64641610 is about 401.3322453794.

The spelling of 64641610 in words is "sixty-four million, six hundred forty-one thousand, six hundred ten".