15239677693249 has 2 divisors, whose sum is σ = 15239677693250. Its totient is φ = 15239677693248.

The previous prime is 15239677693213. The next prime is 15239677693283. The reversal of 15239677693249 is 94239677693251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11387655193600 + 3852022499649 = 3374560^2 + 1962657^2 .

It is an emirp because it is prime and its reverse (94239677693251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15239677693249 - 2²⁷ = 15239543475521 is a prime.

It is a super-2 number, since 2×15239677693249² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15239677690249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7619838846624 + 7619838846625.

It is an arithmetic number, because the mean of its divisors is an integer number (7619838846625).

Almost surely, 2^{15239677693249} is an apocalyptic number.

It is an amenable number.

15239677693249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15239677693249 is an equidigital number, since it uses as much as digits as its factorization.

15239677693249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 925888320, while the sum is 73.

The spelling of 15239677693249 in words is "fifteen trillion, two hundred thirty-nine billion, six hundred seventy-seven million, six hundred ninety-three thousand, two hundred forty-nine".