16564651123773 has 32 divisors (see below), whose sum is σ = 23279736493440. Its totient is φ = 10460746033920.

The previous prime is 16564651123751. The next prime is 16564651123817. The reversal of 16564651123773 is 37732115646561.

It is not a de Polignac number, because 16564651123773 - 2¹² = 16564651119677 is a prime.

It is a super-2 number, since 2×16564651123773² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564651123073) 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 31 ways as a sum of consecutive naturals, for example, 178874343 + ... + 178966923.

It is an arithmetic number, because the mean of its divisors is an integer number (727491765420).

Almost surely, 2^{16564651123773} is an apocalyptic number.

It is an amenable number.

16564651123773 is a deficient number, since it is larger than the sum of its proper divisors (6715085369667).

16564651123773 is a wasteful number, since it uses less digits than its factorization.

16564651123773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131469.

The product of its digits is 19051200, while the sum is 57.

The spelling of 16564651123773 in words is "sixteen trillion, five hundred sixty-four billion, six hundred fifty-one million, one hundred twenty-three thousand, seven hundred seventy-three".