64974263172 has 96 divisors (see below), whose sum is σ = 194705559552. Its totient is φ = 16391016576.

The previous prime is 64974263161. The next prime is 64974263173. The reversal of 64974263172 is 27136247946.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64974263173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1268368 + ... + 1318599.

It is an arithmetic number, because the mean of its divisors is an integer number (2028182912).

Almost surely, 2^64974263172 is an apocalyptic number.

It is an amenable number.

64974263172 is an abundant number, since it is smaller than the sum of its proper divisors (129731296380).

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

64974263172 is a wasteful number, since it uses less digits than its factorization.

64974263172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587017 (or 2587015 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 51.

The spelling of 64974263172 in words is "sixty-four billion, nine hundred seventy-four million, two hundred sixty-three thousand, one hundred seventy-two".