131512323590777 has 2 divisors, whose sum is σ = 131512323590778. Its totient is φ = 131512323590776.

The previous prime is 131512323590771. The next prime is 131512323590779. The reversal of 131512323590777 is 777095323215131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130367618322496 + 1144705268281 = 11417864^2 + 1069909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131512323590777 is a prime.

Together with 131512323590779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131512323590771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65756161795388 + 65756161795389.

It is an arithmetic number, because the mean of its divisors is an integer number (65756161795389).

Almost surely, 2^{131512323590777} is an apocalyptic number.

It is an amenable number.

131512323590777 is a deficient number, since it is larger than the sum of its proper divisors (1).

131512323590777 is an equidigital number, since it uses as much as digits as its factorization.

131512323590777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8334900, while the sum is 56.

The spelling of 131512323590777 in words is "one hundred thirty-one trillion, five hundred twelve billion, three hundred twenty-three million, five hundred ninety thousand, seven hundred seventy-seven".