16564746547 has 2 divisors, whose sum is σ = 16564746548. Its totient is φ = 16564746546.

The previous prime is 16564746469. The next prime is 16564746581. The reversal of 16564746547 is 74564746561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16564746547 - 2¹¹ = 16564744499 is a prime.

It is not a weakly prime, because it can be changed into another prime (16564746047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282373273 + 8282373274.

It is an arithmetic number, because the mean of its divisors is an integer number (8282373274).

Almost surely, 2^16564746547 is an apocalyptic number.

16564746547 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564746547 is an equidigital number, since it uses as much as digits as its factorization.

16564746547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 55.

The spelling of 16564746547 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, five hundred forty-seven".