64994830544 has 20 divisors (see below), whose sum is σ = 143917125024. Its totient is φ = 27854927328.

The previous prime is 64994830543. The next prime is 64994830553. The reversal of 64994830544 is 44503849946.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 64994830544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64994830543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290155382 + ... + 290155605.

Almost surely, 2^64994830544 is an apocalyptic number.

It is an amenable number.

64994830544 is an abundant number, since it is smaller than the sum of its proper divisors (78922294480).

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

64994830544 is a wasteful number, since it uses less digits than its factorization.

64994830544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580311002 (or 580310996 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 64994830544 in words is "sixty-four billion, nine hundred ninety-four million, eight hundred thirty thousand, five hundred forty-four".