16131274693 has 2 divisors, whose sum is σ = 16131274694. Its totient is φ = 16131274692.

The previous prime is 16131274673. The next prime is 16131274703. The reversal of 16131274693 is 39647213161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15690568644 + 440706049 = 125262^2 + 20993^2 .

It is a cyclic number.

It is not a de Polignac number, because 16131274693 - 2⁵ = 16131274661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16131274613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8065637346 + 8065637347.

It is an arithmetic number, because the mean of its divisors is an integer number (8065637347).

Almost surely, 2^16131274693 is an apocalyptic number.

It is an amenable number.

16131274693 is a deficient number, since it is larger than the sum of its proper divisors (1).

16131274693 is an equidigital number, since it uses as much as digits as its factorization.

16131274693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The spelling of 16131274693 in words is "sixteen billion, one hundred thirty-one million, two hundred seventy-four thousand, six hundred ninety-three".