15995672449 has 2 divisors, whose sum is σ = 15995672450. Its totient is φ = 15995672448.

The previous prime is 15995672401. The next prime is 15995672467. The reversal of 15995672449 is 94427659951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13719905424 + 2275767025 = 117132^2 + 47705^2 .

It is a cyclic number.

It is not a de Polignac number, because 15995672449 - 2⁷ = 15995672321 is a prime.

It is not a weakly prime, because it can be changed into another prime (15995672489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7997836224 + 7997836225.

It is an arithmetic number, because the mean of its divisors is an integer number (7997836225).

Almost surely, 2^15995672449 is an apocalyptic number.

It is an amenable number.

15995672449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15995672449 is an equidigital number, since it uses as much as digits as its factorization.

15995672449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24494400, while the sum is 61.

The spelling of 15995672449 in words is "fifteen billion, nine hundred ninety-five million, six hundred seventy-two thousand, four hundred forty-nine".