16456279649 has 2 divisors, whose sum is σ = 16456279650. Its totient is φ = 16456279648.

The previous prime is 16456279613. The next prime is 16456279669. The reversal of 16456279649 is 94697265461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8788125025 + 7668154624 = 93745^2 + 87568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16456279649 is a prime.

It is not a weakly prime, because it can be changed into another prime (16456279669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8228139824 + 8228139825.

It is an arithmetic number, because the mean of its divisors is an integer number (8228139825).

Almost surely, 2^16456279649 is an apocalyptic number.

It is an amenable number.

16456279649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16456279649 is an equidigital number, since it uses as much as digits as its factorization.

16456279649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 59.

The spelling of 16456279649 in words is "sixteen billion, four hundred fifty-six million, two hundred seventy-nine thousand, six hundred forty-nine".