16564735412520 has 64 divisors (see below), whose sum is σ = 50023306995840. Its totient is φ = 4388009376000.

The previous prime is 16564735412513. The next prime is 16564735412527. The reversal of 16564735412520 is 2521453746561.

It is an interprime number because it is at equal distance from previous prime (16564735412513) and next prime (16564735412527).

It is not an unprimeable number, because it can be changed into a prime (16564735412527) 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 15 ways as a sum of consecutive naturals, for example, 457066191 + ... + 457102430.

It is an arithmetic number, because the mean of its divisors is an integer number (781614171810).

Almost surely, 2^{16564735412520} is an apocalyptic number.

16564735412520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16564735412520 is an abundant number, since it is smaller than the sum of its proper divisors (33458571583320).

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

16564735412520 is a wasteful number, since it uses less digits than its factorization.

16564735412520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914168786 (or 914168782 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 51.

The spelling of 16564735412520 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred thirty-five million, four hundred twelve thousand, five hundred twenty".