15710679868921 has 2 divisors, whose sum is σ = 15710679868922. Its totient is φ = 15710679868920.

The previous prime is 15710679868889. The next prime is 15710679868927. The reversal of 15710679868921 is 12986897601751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14248058115600 + 1462621753321 = 3774660^2 + 1209389^2 .

It is a cyclic number.

It is not a de Polignac number, because 15710679868921 - 2⁵ = 15710679868889 is a prime.

It is a super-3 number, since 3×15710679868921³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (15710679868927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855339934460 + 7855339934461.

It is an arithmetic number, because the mean of its divisors is an integer number (7855339934461).

Almost surely, 2^{15710679868921} is an apocalyptic number.

It is an amenable number.

15710679868921 is a deficient number, since it is larger than the sum of its proper divisors (1).

15710679868921 is an equidigital number, since it uses as much as digits as its factorization.

15710679868921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 70.

The spelling of 15710679868921 in words is "fifteen trillion, seven hundred ten billion, six hundred seventy-nine million, eight hundred sixty-eight thousand, nine hundred twenty-one".