16564044272720 has 40 divisors (see below), whose sum is σ = 44013031926144. Its totient is φ = 5679100893312.

The previous prime is 16564044272693. The next prime is 16564044272749. The reversal of 16564044272720 is 2727244046561.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14789324684 + ... + 14789325803.

Almost surely, 2^{16564044272720} is an apocalyptic number.

16564044272720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16564044272720 is an abundant number, since it is smaller than the sum of its proper divisors (27448987653424).

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

16564044272720 is a wasteful number, since it uses less digits than its factorization.

16564044272720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29578650507 (or 29578650501 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 50.

The spelling of 16564044272720 in words is "sixteen trillion, five hundred sixty-four billion, forty-four million, two hundred seventy-two thousand, seven hundred twenty".