16864317929 has 2 divisors, whose sum is σ = 16864317930. Its totient is φ = 16864317928.

The previous prime is 16864317893. The next prime is 16864317937. The reversal of 16864317929 is 92971346861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14059556329 + 2804761600 = 118573^2 + 52960^2 .

It is a cyclic number.

It is not a de Polignac number, because 16864317929 - 2²⁴ = 16847540713 is a prime.

It is not a weakly prime, because it can be changed into another prime (16864317229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432158964 + 8432158965.

It is an arithmetic number, because the mean of its divisors is an integer number (8432158965).

Almost surely, 2^16864317929 is an apocalyptic number.

It is an amenable number.

16864317929 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864317929 is an equidigital number, since it uses as much as digits as its factorization.

16864317929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The spelling of 16864317929 in words is "sixteen billion, eight hundred sixty-four million, three hundred seventeen thousand, nine hundred twenty-nine".