64718972 has 6 divisors (see below), whose sum is σ = 113258208. Its totient is φ = 32359484.

The previous prime is 64718911. The next prime is 64718993. The reversal of 64718972 is 27981746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8089868 + ... + 8089875.

It is an arithmetic number, because the mean of its divisors is an integer number (18876368).

Almost surely, 2^64718972 is an apocalyptic number.

It is an amenable number.

64718972 is a deficient number, since it is larger than the sum of its proper divisors (48539236).

64718972 is a wasteful number, since it uses less digits than its factorization.

64718972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16179747 (or 16179745 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 64718972 is about 8044.8102525790. The cubic root of 64718972 is about 401.4922841302.

The spelling of 64718972 in words is "sixty-four million, seven hundred eighteen thousand, nine hundred seventy-two".