16564746539 has 8 divisors (see below), whose sum is σ = 18082516032. Its totient is φ = 15048957640.

The previous prime is 16564746469. The next prime is 16564746547. The reversal of 16564746539 is 93564746561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16564746539 - 2⁸ = 16564746283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16564746239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477629 + ... + 511134.

It is an arithmetic number, because the mean of its divisors is an integer number (2260314504).

Almost surely, 2^16564746539 is an apocalyptic number.

16564746539 is a deficient number, since it is larger than the sum of its proper divisors (1517769493).

16564746539 is a wasteful number, since it uses less digits than its factorization.

16564746539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990297.

The product of its digits is 16329600, while the sum is 56.

The spelling of 16564746539 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, five hundred thirty-nine".