64997279946 has 24 divisors (see below), whose sum is σ = 141271702884. Its totient is φ = 21597411840.

The previous prime is 64997279899. The next prime is 64997280011.

64997279946 is a `hidden beast` number, since 6 + 499 + 7 + 2 + 7 + 99 + 46 = 666.

64997279946 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 59012555625 + 5984724321 = 242925^2 + 77361^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5689815 + ... + 5701226.

Almost surely, 2^64997279946 is an apocalyptic number.

64997279946 is an abundant number, since it is smaller than the sum of its proper divisors (76274422938).

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

64997279946 is a wasteful number, since it uses less digits than its factorization.

64997279946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11391366 (or 11391363 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 64997279946 in words is "sixty-four billion, nine hundred ninety-seven million, two hundred seventy-nine thousand, nine hundred forty-six".