64685634 has 32 divisors (see below), whose sum is σ = 139708800. Its totient is φ = 19848192.

The previous prime is 64685617. The next prime is 64685669. The reversal of 64685634 is 43658646.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34099 + ... + 35945.

It is an arithmetic number, because the mean of its divisors is an integer number (4365900).

Almost surely, 2^64685634 is an apocalyptic number.

64685634 is an abundant number, since it is smaller than the sum of its proper divisors (75023166).

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

64685634 is a wasteful number, since it uses less digits than its factorization.

64685634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314.

The product of its digits is 414720, while the sum is 42.

The square root of 64685634 is about 8042.7379666380. The cubic root of 64685634 is about 401.4233334640.

The spelling of 64685634 in words is "sixty-four million, six hundred eighty-five thousand, six hundred thirty-four".