131374597565 has 16 divisors (see below), whose sum is σ = 158170374000. Its totient is φ = 104752883712.

The previous prime is 131374597561. The next prime is 131374597567. The reversal of 131374597565 is 565795473131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 35988745849 + 95385851716 = 189707^2 + 308846^2 .

It is a cyclic number.

It is not a de Polignac number, because 131374597565 - 2² = 131374597561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131374597565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131374597561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412761 + ... + 2466609.

It is an arithmetic number, because the mean of its divisors is an integer number (9885648375).

Almost surely, 2^131374597565 is an apocalyptic number.

It is an amenable number.

131374597565 is a deficient number, since it is larger than the sum of its proper divisors (26795776435).

131374597565 is a wasteful number, since it uses less digits than its factorization.

131374597565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55456.

The product of its digits is 11907000, while the sum is 56.

The spelling of 131374597565 in words is "one hundred thirty-one billion, three hundred seventy-four million, five hundred ninety-seven thousand, five hundred sixty-five".