15316022972449 has 2 divisors, whose sum is σ = 15316022972450. Its totient is φ = 15316022972448.

The previous prime is 15316022972357. The next prime is 15316022972483. The reversal of 15316022972449 is 94427922061351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9638739855424 + 5677283117025 = 3104632^2 + 2382705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15316022972449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15316022972449.

It is not a weakly prime, because it can be changed into another prime (15316022972149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7658011486224 + 7658011486225.

It is an arithmetic number, because the mean of its divisors is an integer number (7658011486225).

Almost surely, 2^{15316022972449} is an apocalyptic number.

It is an amenable number.

15316022972449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15316022972449 is an equidigital number, since it uses as much as digits as its factorization.

15316022972449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 15316022972449 in words is "fifteen trillion, three hundred sixteen billion, twenty-two million, nine hundred seventy-two thousand, four hundred forty-nine".