64970481816 has 96 divisors (see below), whose sum is σ = 191348015040. Its totient is φ = 19831993344.

The previous prime is 64970481773. The next prime is 64970481841. The reversal of 64970481816 is 61818407946.

64970481816 is a `hidden beast` number, since 64 + 97 + 0 + 481 + 8 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672016 + ... + 762591.

It is an arithmetic number, because the mean of its divisors is an integer number (1993208490).

Almost surely, 2^64970481816 is an apocalyptic number.

It is an amenable number.

64970481816 is an abundant number, since it is smaller than the sum of its proper divisors (126377533224).

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

64970481816 is a wasteful number, since it uses less digits than its factorization.

64970481816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434673 (or 1434666 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 64970481816 in words is "sixty-four billion, nine hundred seventy million, four hundred eighty-one thousand, eight hundred sixteen".