12515770731337 has 2 divisors, whose sum is σ = 12515770731338. Its totient is φ = 12515770731336.

The previous prime is 12515770731241. The next prime is 12515770731379. The reversal of 12515770731337 is 73313707751521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12308512705801 + 207258025536 = 3508349^2 + 455256^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515770731337 - 2²⁷ = 12515636513609 is a prime.

It is not a weakly prime, because it can be changed into another prime (12515770731397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257885365668 + 6257885365669.

It is an arithmetic number, because the mean of its divisors is an integer number (6257885365669).

Almost surely, 2^{12515770731337} is an apocalyptic number.

It is an amenable number.

12515770731337 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515770731337 is an equidigital number, since it uses as much as digits as its factorization.

12515770731337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3241350, while the sum is 52.

The spelling of 12515770731337 in words is "twelve trillion, five hundred fifteen billion, seven hundred seventy million, seven hundred thirty-one thousand, three hundred thirty-seven".