16564713647643 has 12 divisors (see below), whose sum is σ = 27344924116848. Its totient is φ = 9465550655760.

The previous prime is 16564713647639. The next prime is 16564713647731. The reversal of 16564713647643 is 34674631746561.

16564713647643 is a `hidden beast` number, since 1 + 6 + 5 + 64 + 71 + 36 + 476 + 4 + 3 = 666.

It is not a de Polignac number, because 16564713647643 - 2² = 16564713647639 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 262931962661 = 16564713647643 / (1 + 6 + 5 + 6 + 4 + 7 + 1 + 3 + 6 + 4 + 7 + 6 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (16564713647543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131465981268 + ... + 131465981393.

It is an arithmetic number, because the mean of its divisors is an integer number (2278743676404).

Almost surely, 2^{16564713647643} is an apocalyptic number.

16564713647643 is a deficient number, since it is larger than the sum of its proper divisors (10780210469205).

16564713647643 is a wasteful number, since it uses less digits than its factorization.

16564713647643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262931962674 (or 262931962671 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 63.

The spelling of 16564713647643 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred thirteen million, six hundred forty-seven thousand, six hundred forty-three".