64971612 has 24 divisors (see below), whose sum is σ = 168445200. Its totient is φ = 21657168.

The previous prime is 64971611. The next prime is 64971617. The reversal of 64971612 is 21617946.

64971612 is a `hidden beast` number, since 6 + 497 + 161 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64971611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300687 + ... + 300902.

It is an arithmetic number, because the mean of its divisors is an integer number (7018550).

Almost surely, 2^64971612 is an apocalyptic number.

It is an amenable number.

64971612 is an abundant number, since it is smaller than the sum of its proper divisors (103473588).

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

64971612 is a wasteful number, since it uses less digits than its factorization.

64971612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601602 (or 601594 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 64971612 is about 8060.4970070089. The cubic root of 64971612 is about 402.0140338162.

The spelling of 64971612 in words is "sixty-four million, nine hundred seventy-one thousand, six hundred twelve".