64914681976 has 32 divisors (see below), whose sum is σ = 121962672000. Its totient is φ = 32391370240.

The previous prime is 64914681967. The next prime is 64914682037. The reversal of 64914681976 is 67918641946.

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, 11095500 + ... + 11101348.

It is an arithmetic number, because the mean of its divisors is an integer number (3811333500).

Almost surely, 2^64914681976 is an apocalyptic number.

It is an amenable number.

64914681976 is a deficient number, since it is larger than the sum of its proper divisors (57047990024).

64914681976 is a wasteful number, since it uses less digits than its factorization.

64914681976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8439 (or 8435 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The spelling of 64914681976 in words is "sixty-four billion, nine hundred fourteen million, six hundred eighty-one thousand, nine hundred seventy-six".