64191589989504 has 32 divisors (see below), whose sum is σ = 170508910910640. Its totient is φ = 21397196663040.

The previous prime is 64191589989473. The next prime is 64191589989511. The reversal of 64191589989504 is 40598998519146.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (78) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64191589989504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83582799082 + ... + 83582799849.

Almost surely, 2^{64191589989504} is an apocalyptic number.

64191589989504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64191589989504 is an abundant number, since it is smaller than the sum of its proper divisors (106317320921136).

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

64191589989504 is a wasteful number, since it uses less digits than its factorization.

64191589989504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167165598948 (or 167165598936 counting only the distinct ones).

The product of its (nonzero) digits is 1007769600, while the sum is 78.

The spelling of 64191589989504 in words is "sixty-four trillion, one hundred ninety-one billion, five hundred eighty-nine million, nine hundred eighty-nine thousand, five hundred four".