131368998972257 has 2 divisors, whose sum is σ = 131368998972258. Its totient is φ = 131368998972256.

The previous prime is 131368998972209. The next prime is 131368998972317. The reversal of 131368998972257 is 752279899863131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129357662349601 + 2011336622656 = 11373551^2 + 1418216^2 .

It is a cyclic number.

It is not a de Polignac number, because 131368998972257 - 2⁴⁰ = 130269487344481 is a prime.

It is not a weakly prime, because it can be changed into another prime (131368998977257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65684499486128 + 65684499486129.

It is an arithmetic number, because the mean of its divisors is an integer number (65684499486129).

Almost surely, 2^{131368998972257} is an apocalyptic number.

It is an amenable number.

131368998972257 is a deficient number, since it is larger than the sum of its proper divisors (1).

131368998972257 is an equidigital number, since it uses as much as digits as its factorization.

131368998972257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469035520, while the sum is 80.

The spelling of 131368998972257 in words is "one hundred thirty-one trillion, three hundred sixty-eight billion, nine hundred ninety-eight million, nine hundred seventy-two thousand, two hundred fifty-seven".