15243668917 has 2 divisors, whose sum is σ = 15243668918. Its totient is φ = 15243668916.

The previous prime is 15243668833. The next prime is 15243668929. The reversal of 15243668917 is 71986634251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13751314756 + 1492354161 = 117266^2 + 38631^2 .

It is a cyclic number.

It is not a de Polignac number, because 15243668917 - 2⁷ = 15243668789 is a prime.

It is a super-2 number, since 2×15243668917² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15243668977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621834458 + 7621834459.

It is an arithmetic number, because the mean of its divisors is an integer number (7621834459).

Almost surely, 2^15243668917 is an apocalyptic number.

It is an amenable number.

15243668917 is a deficient number, since it is larger than the sum of its proper divisors (1).

15243668917 is an equidigital number, since it uses as much as digits as its factorization.

15243668917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The spelling of 15243668917 in words is "fifteen billion, two hundred forty-three million, six hundred sixty-eight thousand, nine hundred seventeen".