12696581377 has 2 divisors, whose sum is σ = 12696581378. Its totient is φ = 12696581376.

The previous prime is 12696581357. The next prime is 12696581533. The reversal of 12696581377 is 77318569621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12696557041 + 24336 = 112679^2 + 156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12696581377 is a prime.

It is a super-2 number, since 2×12696581377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12696581347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6348290688 + 6348290689.

It is an arithmetic number, because the mean of its divisors is an integer number (6348290689).

Almost surely, 2^12696581377 is an apocalyptic number.

It is an amenable number.

12696581377 is a deficient number, since it is larger than the sum of its proper divisors (1).

12696581377 is an equidigital number, since it uses as much as digits as its factorization.

12696581377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The spelling of 12696581377 in words is "twelve billion, six hundred ninety-six million, five hundred eighty-one thousand, three hundred seventy-seven".