64911172 has 12 divisors (see below), whose sum is σ = 116664940. Its totient is φ = 31578336.

The previous prime is 64911131. The next prime is 64911173. The reversal of 64911172 is 27111946.

It can be written as a sum of positive squares in 2 ways, for example, as 60000516 + 4910656 = 7746^2 + 2216^2 .

It is not an unprimeable number, because it can be changed into a prime (64911173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219147 + ... + 219442.

Almost surely, 2^64911172 is an apocalyptic number.

It is an amenable number.

64911172 is a deficient number, since it is larger than the sum of its proper divisors (51753768).

64911172 is a wasteful number, since it uses less digits than its factorization.

64911172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438630 (or 438628 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 64911172 is about 8056.7469862222. The cubic root of 64911172 is about 401.8893369642.

The spelling of 64911172 in words is "sixty-four million, nine hundred eleven thousand, one hundred seventy-two".