64139116 has 24 divisors (see below), whose sum is σ = 115577280. Its totient is φ = 31130112.

The previous prime is 64139087. The next prime is 64139149. The reversal of 64139116 is 61193146.

It is a super-2 number, since 2×64139116² = 8227652402522912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19005 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (4815720).

Almost surely, 2^64139116 is an apocalyptic number.

It is an amenable number.

64139116 is a deficient number, since it is larger than the sum of its proper divisors (51438164).

64139116 is a wasteful number, since it uses less digits than its factorization.

64139116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273 (or 3271 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 64139116 is about 8008.6900302109. The cubic root of 64139116 is about 400.2896152569.

The spelling of 64139116 in words is "sixty-four million, one hundred thirty-nine thousand, one hundred sixteen".