16864731791 has 2 divisors, whose sum is σ = 16864731792. Its totient is φ = 16864731790.

The previous prime is 16864731773. The next prime is 16864731803. The reversal of 16864731791 is 19713746861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16864731791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864731691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432365895 + 8432365896.

It is an arithmetic number, because the mean of its divisors is an integer number (8432365896).

Almost surely, 2^16864731791 is an apocalyptic number.

16864731791 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864731791 is an equidigital number, since it uses as much as digits as its factorization.

16864731791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The spelling of 16864731791 in words is "sixteen billion, eight hundred sixty-four million, seven hundred thirty-one thousand, seven hundred ninety-one".