64869794646 has 12 divisors (see below), whose sum is σ = 129740837052. Its totient is φ = 21623056924.

The previous prime is 64869794629. The next prime is 64869794669. The reversal of 64869794646 is 64649796846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571885 + ... + 675863.

It is an arithmetic number, because the mean of its divisors is an integer number (10811736421).

Almost surely, 2^64869794646 is an apocalyptic number.

64869794646 is an abundant number, since it is smaller than the sum of its proper divisors (64871042406).

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

64869794646 is an frugal number, since it uses more digits than its factorization.

64869794646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207963 (or 103984 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 69.

The spelling of 64869794646 in words is "sixty-four billion, eight hundred sixty-nine million, seven hundred ninety-four thousand, six hundred forty-six".