12694791961 has 2 divisors, whose sum is σ = 12694791962. Its totient is φ = 12694791960.

The previous prime is 12694791953. The next prime is 12694791997. The reversal of 12694791961 is 16919749621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11042857225 + 1651934736 = 105085^2 + 40644^2 .

It is a cyclic number.

It is not a de Polignac number, because 12694791961 - 2³ = 12694791953 is a prime.

It is a super-3 number, since 3×12694791961³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12694791931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347395980 + 6347395981.

It is an arithmetic number, because the mean of its divisors is an integer number (6347395981).

Almost surely, 2^12694791961 is an apocalyptic number.

It is an amenable number.

12694791961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694791961 is an equidigital number, since it uses as much as digits as its factorization.

12694791961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The spelling of 12694791961 in words is "twelve billion, six hundred ninety-four million, seven hundred ninety-one thousand, nine hundred sixty-one".