16564746537 has 8 divisors (see below), whose sum is σ = 24540365280. Its totient is φ = 11043164340.

The previous prime is 16564746469. The next prime is 16564746547. The reversal of 16564746537 is 73564746561.

16564746537 is a `hidden beast` number, since 1 + 6 + 5 + 64 + 7 + 46 + 537 = 666.

It is not a de Polignac number, because 16564746537 - 2⁸ = 16564746281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16564746547) 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, 306754539 + ... + 306754592.

It is an arithmetic number, because the mean of its divisors is an integer number (3067545660).

Almost surely, 2^16564746537 is an apocalyptic number.

It is an amenable number.

16564746537 is a deficient number, since it is larger than the sum of its proper divisors (7975618743).

16564746537 is an equidigital number, since it uses as much as digits as its factorization.

16564746537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613509140 (or 613509134 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The spelling of 16564746537 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, five hundred thirty-seven".