16564764771536 has 20 divisors (see below), whose sum is σ = 32097371476032. Its totient is φ = 8281572132576.

The previous prime is 16564764771509. The next prime is 16564764771553. The reversal of 16564764771536 is 63517746746561.

It is a super-2 number, since 2×16564764771536² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 50472146 + ... + 50799281.

Almost surely, 2^{16564764771536} is an apocalyptic number.

16564764771536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16564764771536 is a deficient number, since it is larger than the sum of its proper divisors (15532606704496).

16564764771536 is a wasteful number, since it uses less digits than its factorization.

16564764771536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101281658 (or 101281652 counting only the distinct ones).

The product of its digits is 533433600, while the sum is 68.

The spelling of 16564764771536 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred sixty-four million, seven hundred seventy-one thousand, five hundred thirty-six".