131377044565 has 32 divisors (see below), whose sum is σ = 180512883936. Its totient is φ = 90930954240.

The previous prime is 131377044563. The next prime is 131377044577. The reversal of 131377044565 is 565440773131.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 48358116 + 131328686449 = 6954^2 + 362393^2 .

It is not a de Polignac number, because 131377044565 - 2¹ = 131377044563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131377044563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19639 + ... + 512971.

It is an arithmetic number, because the mean of its divisors is an integer number (5641027623).

Almost surely, 2^131377044565 is an apocalyptic number.

It is an amenable number.

131377044565 is a deficient number, since it is larger than the sum of its proper divisors (49135839371).

131377044565 is a wasteful number, since it uses less digits than its factorization.

131377044565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493609.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 131377044565 in words is "one hundred thirty-one billion, three hundred seventy-seven million, forty-four thousand, five hundred sixty-five".