131888763761 has 2 divisors, whose sum is σ = 131888763762. Its totient is φ = 131888763760.

The previous prime is 131888763733. The next prime is 131888763791. The reversal of 131888763761 is 167367888131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121309407025 + 10579356736 = 348295^2 + 102856^2 .

It is a cyclic number.

It is not a de Polignac number, because 131888763761 - 2²² = 131884569457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131888763761.

It is not a weakly prime, because it can be changed into another prime (131888763791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65944381880 + 65944381881.

It is an arithmetic number, because the mean of its divisors is an integer number (65944381881).

Almost surely, 2^131888763761 is an apocalyptic number.

It is an amenable number.

131888763761 is a deficient number, since it is larger than the sum of its proper divisors (1).

131888763761 is an equidigital number, since it uses as much as digits as its factorization.

131888763761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 59.

The spelling of 131888763761 in words is "one hundred thirty-one billion, eight hundred eighty-eight million, seven hundred sixty-three thousand, seven hundred sixty-one".