131356945061 has 2 divisors, whose sum is σ = 131356945062. Its totient is φ = 131356945060.

The previous prime is 131356945051. The next prime is 131356945081. The reversal of 131356945061 is 160549653131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110214040225 + 21142904836 = 331985^2 + 145406^2 .

It is a cyclic number.

It is not a de Polignac number, because 131356945061 - 2²² = 131352750757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131356945051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65678472530 + 65678472531.

It is an arithmetic number, because the mean of its divisors is an integer number (65678472531).

Almost surely, 2^131356945061 is an apocalyptic number.

It is an amenable number.

131356945061 is a deficient number, since it is larger than the sum of its proper divisors (1).

131356945061 is an equidigital number, since it uses as much as digits as its factorization.

131356945061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 131356945061 in words is "one hundred thirty-one billion, three hundred fifty-six million, nine hundred forty-five thousand, sixty-one".