64621634 has 32 divisors (see below), whose sum is σ = 122674176. Its totient is φ = 24797520.

The previous prime is 64621633. The next prime is 64621637. The reversal of 64621634 is 43612646.

It is a self number, because there is not a number n which added to its sum of digits gives 64621634.

It is not an unprimeable number, because it can be changed into a prime (64621633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7187 + ... + 13449.

It is an arithmetic number, because the mean of its divisors is an integer number (3833568).

Almost surely, 2^64621634 is an apocalyptic number.

64621634 is a deficient number, since it is larger than the sum of its proper divisors (58052542).

64621634 is a wasteful number, since it uses less digits than its factorization.

64621634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its digits is 20736, while the sum is 32.

The square root of 64621634 is about 8038.7582374394. The cubic root of 64621634 is about 401.2909002928.

The spelling of 64621634 in words is "sixty-four million, six hundred twenty-one thousand, six hundred thirty-four".