16564645254444 has 24 divisors (see below), whose sum is σ = 44172387345408. Its totient is φ = 4732755786960.

The previous prime is 16564645254401. The next prime is 16564645254467. The reversal of 16564645254444 is 44445254646561.

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, 98599078812 + ... + 98599078979.

It is an arithmetic number, because the mean of its divisors is an integer number (1840516139392).

Almost surely, 2^{16564645254444} is an apocalyptic number.

16564645254444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16564645254444 is an abundant number, since it is smaller than the sum of its proper divisors (27607742090964).

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

16564645254444 is a wasteful number, since it uses less digits than its factorization.

16564645254444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197198157805 (or 197198157803 counting only the distinct ones).

The product of its digits is 221184000, while the sum is 60.

The spelling of 16564645254444 in words is "sixteen trillion, five hundred sixty-four billion, six hundred forty-five million, two hundred fifty-four thousand, four hundred forty-four".