64972912 has 40 divisors (see below), whose sum is σ = 135835056. Its totient is φ = 29991936.

The previous prime is 64972889. The next prime is 64972939. The reversal of 64972912 is 21927946.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 12163 + ... + 16669.

Almost surely, 2^64972912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64972912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67917528).

64972912 is an abundant number, since it is smaller than the sum of its proper divisors (70862144).

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

64972912 is a wasteful number, since it uses less digits than its factorization.

64972912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585 (or 4579 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 64972912 is about 8060.5776467943. The cubic root of 64972912 is about 402.0167150628.

It can be divided in two parts, 6497 and 2912, that added together give a square (9409 = 97²).

The spelling of 64972912 in words is "sixty-four million, nine hundred seventy-two thousand, nine hundred twelve".