131564161277 has 2 divisors, whose sum is σ = 131564161278. Its totient is φ = 131564161276.

The previous prime is 131564161271. The next prime is 131564161297. The reversal of 131564161277 is 772161465131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96335123641 + 35229037636 = 310379^2 + 187694^2 .

It is a cyclic number.

It is not a de Polignac number, because 131564161277 - 2⁸ = 131564161021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131564161271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65782080638 + 65782080639.

It is an arithmetic number, because the mean of its divisors is an integer number (65782080639).

Almost surely, 2^131564161277 is an apocalyptic number.

It is an amenable number.

131564161277 is a deficient number, since it is larger than the sum of its proper divisors (1).

131564161277 is an equidigital number, since it uses as much as digits as its factorization.

131564161277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The spelling of 131564161277 in words is "one hundred thirty-one billion, five hundred sixty-four million, one hundred sixty-one thousand, two hundred seventy-seven".