16456312399 has 2 divisors, whose sum is σ = 16456312400. Its totient is φ = 16456312398.

The previous prime is 16456312339. The next prime is 16456312417. The reversal of 16456312399 is 99321365461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16456312399 is a prime.

It is a super-3 number, since 3×16456312399³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16456312339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8228156199 + 8228156200.

It is an arithmetic number, because the mean of its divisors is an integer number (8228156200).

Almost surely, 2^16456312399 is an apocalyptic number.

16456312399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16456312399 is an equidigital number, since it uses as much as digits as its factorization.

16456312399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The spelling of 16456312399 in words is "sixteen billion, four hundred fifty-six million, three hundred twelve thousand, three hundred ninety-nine".