64927294972 has 24 divisors (see below), whose sum is σ = 117137424096. Its totient is φ = 31466132928.

The previous prime is 64927294963. The next prime is 64927294979. The reversal of 64927294972 is 27949272946.

It is a self number, because there is not a number n which added to its sum of digits gives 64927294972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64927294979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795103 + ... + 872950.

It is an arithmetic number, because the mean of its divisors is an integer number (4880726004).

Almost surely, 2^64927294972 is an apocalyptic number.

It is an amenable number.

64927294972 is a deficient number, since it is larger than the sum of its proper divisors (52210129124).

64927294972 is a wasteful number, since it uses less digits than its factorization.

64927294972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668357 (or 1668355 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 61.

The spelling of 64927294972 in words is "sixty-four billion, nine hundred twenty-seven million, two hundred ninety-four thousand, nine hundred seventy-two".