16131677761 has 2 divisors, whose sum is σ = 16131677762. Its totient is φ = 16131677760.

The previous prime is 16131677747. The next prime is 16131677777. The reversal of 16131677761 is 16777613161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15589020736 + 542657025 = 124856^2 + 23295^2 .

It is a cyclic number.

It is not a de Polignac number, because 16131677761 - 2¹⁹ = 16131153473 is a prime.

It is not a weakly prime, because it can be changed into another prime (16131677741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8065838880 + 8065838881.

It is an arithmetic number, because the mean of its divisors is an integer number (8065838881).

Almost surely, 2^16131677761 is an apocalyptic number.

It is an amenable number.

16131677761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16131677761 is an equidigital number, since it uses as much as digits as its factorization.

16131677761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The spelling of 16131677761 in words is "sixteen billion, one hundred thirty-one million, six hundred seventy-seven thousand, seven hundred sixty-one".