15716664049 has 2 divisors, whose sum is σ = 15716664050. Its totient is φ = 15716664048.

The previous prime is 15716664031. The next prime is 15716664107. The reversal of 15716664049 is 94046661751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15621250225 + 95413824 = 124985^2 + 9768^2 .

It is a cyclic number.

It is not a de Polignac number, because 15716664049 - 2³³ = 7126729457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15716663993 and 15716664011.

It is not a weakly prime, because it can be changed into another prime (15716664349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7858332024 + 7858332025.

It is an arithmetic number, because the mean of its divisors is an integer number (7858332025).

Almost surely, 2^15716664049 is an apocalyptic number.

It is an amenable number.

15716664049 is a deficient number, since it is larger than the sum of its proper divisors (1).

15716664049 is an equidigital number, since it uses as much as digits as its factorization.

15716664049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 15716664049 in words is "fifteen billion, seven hundred sixteen million, six hundred sixty-four thousand, forty-nine".