64138605 has 48 divisors (see below), whose sum is σ = 109892160. Its totient is φ = 31930624.

The previous prime is 64138601. The next prime is 64138619. The reversal of 64138605 is 50683146.

It is not a de Polignac number, because 64138605 - 2² = 64138601 is a prime.

It is a super-2 number, since 2×64138605² = 8227521302692050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64138601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 468097 + ... + 468233.

It is an arithmetic number, because the mean of its divisors is an integer number (2289420).

Almost surely, 2^64138605 is an apocalyptic number.

It is an amenable number.

64138605 is a deficient number, since it is larger than the sum of its proper divisors (45753555).

64138605 is a wasteful number, since it uses less digits than its factorization.

64138605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 64138605 is about 8008.6581273020. The cubic root of 64138605 is about 400.2885522107.

The spelling of 64138605 in words is "sixty-four million, one hundred thirty-eight thousand, six hundred five".