131869256432356 has 27 divisors (see below), whose sum is σ = 231792578544891. Its totient is φ = 65644085852544.

The previous prime is 131869256432341. The next prime is 131869256432383. The reversal of 131869256432356 is 653234652968131.

It is a happy number.

The square root of 131869256432356 is 11483434.

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

It can be written as a sum of positive squares in 4 ways, for example, as 21723895592100 + 110145360840256 = 4660890^2 + 10495016^2 .

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5259400236 + ... + 5259425308.

Almost surely, 2^{131869256432356} is an apocalyptic number.

131869256432356 is the 11483434-th square number.

It is an amenable number.

131869256432356 is a deficient number, since it is larger than the sum of its proper divisors (99923322112535).

131869256432356 is an frugal number, since it uses more digits than its factorization.

131869256432356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50608 (or 25304 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 64.

The spelling of 131869256432356 in words is "one hundred thirty-one trillion, eight hundred sixty-nine billion, two hundred fifty-six million, four hundred thirty-two thousand, three hundred fifty-six".