131745672661 has 2 divisors, whose sum is σ = 131745672662. Its totient is φ = 131745672660.

The previous prime is 131745672613. The next prime is 131745672689. The reversal of 131745672661 is 166276547131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125436388900 + 6309283761 = 354170^2 + 79431^2 .

It is a cyclic number.

It is not a de Polignac number, because 131745672661 - 2²⁵ = 131712118229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131745675661) 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, 65872836330 + 65872836331.

It is an arithmetic number, because the mean of its divisors is an integer number (65872836331).

Almost surely, 2^131745672661 is an apocalyptic number.

It is an amenable number.

131745672661 is a deficient number, since it is larger than the sum of its proper divisors (1).

131745672661 is an equidigital number, since it uses as much as digits as its factorization.

131745672661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The spelling of 131745672661 in words is "one hundred thirty-one billion, seven hundred forty-five million, six hundred seventy-two thousand, six hundred sixty-one".