15195861886969 has 9 divisors (see below), whose sum is σ = 15243203852751. Its totient is φ = 15148666536960.

The previous prime is 15195861886913. The next prime is 15195861886973. The reversal of 15195861886969 is 96968816859151.

The square root of 15195861886969 is 3898187.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10640676620025 + 4555185266944 = 3262005^2 + 2134288^2 .

It is not a de Polignac number, because 15195861886969 - 2⁴¹ = 12996838631417 is a prime.

It is a super-2 number, since 2×15195861886969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15195861886892 and 15195861886901.

It is not an unprimeable number, because it can be changed into a prime (15195861886979) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1290294009 + ... + 1290305785.

Almost surely, 2^{15195861886969} is an apocalyptic number.

15195861886969 is the 3898187-th square number.

15195861886969 is the 1949094-th centered octagonal number.

It is an amenable number.

15195861886969 is a deficient number, since it is larger than the sum of its proper divisors (47341965782).

15195861886969 is an frugal number, since it uses more digits than its factorization.

15195861886969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24216 (or 12108 counting only the distinct ones).

The product of its digits is 2015539200, while the sum is 82.

The spelling of 15195861886969 in words is "fifteen trillion, one hundred ninety-five billion, eight hundred sixty-one million, eight hundred eighty-six thousand, nine hundred sixty-nine".