16864731773 has 2 divisors, whose sum is σ = 16864731774. Its totient is φ = 16864731772.

The previous prime is 16864731733. The next prime is 16864731791. The reversal of 16864731773 is 37713746861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16749018724 + 115713049 = 129418^2 + 10757^2 .

It is a cyclic number.

It is not a de Polignac number, because 16864731773 - 2²² = 16860537469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864731703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432365886 + 8432365887.

It is an arithmetic number, because the mean of its divisors is an integer number (8432365887).

Almost surely, 2^16864731773 is an apocalyptic number.

It is an amenable number.

16864731773 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864731773 is an equidigital number, since it uses as much as digits as its factorization.

16864731773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 53.

The spelling of 16864731773 in words is "sixteen billion, eight hundred sixty-four million, seven hundred thirty-one thousand, seven hundred seventy-three".