15688716715913 has 2 divisors, whose sum is σ = 15688716715914. Its totient is φ = 15688716715912.

The previous prime is 15688716715883. The next prime is 15688716715927. The reversal of 15688716715913 is 31951761788651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12202082949904 + 3486633766009 = 3493148^2 + 1867253^2 .

It is a cyclic number.

It is not a de Polignac number, because 15688716715913 - 2¹⁰ = 15688716714889 is a prime.

It is a super-2 number, since 2×15688716715913² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15688716715013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7844358357956 + 7844358357957.

It is an arithmetic number, because the mean of its divisors is an integer number (7844358357957).

Almost surely, 2^{15688716715913} is an apocalyptic number.

It is an amenable number.

15688716715913 is a deficient number, since it is larger than the sum of its proper divisors (1).

15688716715913 is an equidigital number, since it uses as much as digits as its factorization.

15688716715913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 68.

The spelling of 15688716715913 in words is "fifteen trillion, six hundred eighty-eight billion, seven hundred sixteen million, seven hundred fifteen thousand, nine hundred thirteen".