131781554622763 has 2 divisors, whose sum is σ = 131781554622764. Its totient is φ = 131781554622762.

The previous prime is 131781554622721. The next prime is 131781554622769. The reversal of 131781554622763 is 367226455187131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131781554622763 is a prime.

It is not a weakly prime, because it can be changed into another prime (131781554622769) 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, 65890777311381 + 65890777311382.

It is an arithmetic number, because the mean of its divisors is an integer number (65890777311382).

Almost surely, 2^{131781554622763} is an apocalyptic number.

131781554622763 is a deficient number, since it is larger than the sum of its proper divisors (1).

131781554622763 is an equidigital number, since it uses as much as digits as its factorization.

131781554622763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50803200, while the sum is 61.

The spelling of 131781554622763 in words is "one hundred thirty-one trillion, seven hundred eighty-one billion, five hundred fifty-four million, six hundred twenty-two thousand, seven hundred sixty-three".