12396677681 has 2 divisors, whose sum is σ = 12396677682. Its totient is φ = 12396677680.

The previous prime is 12396677677. The next prime is 12396677693. The reversal of 12396677681 is 18677669321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9386509456 + 3010168225 = 96884^2 + 54865^2 .

It is a cyclic number.

It is not a de Polignac number, because 12396677681 - 2² = 12396677677 is a prime.

It is a super-2 number, since 2×12396677681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12396677611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198338840 + 6198338841.

It is an arithmetic number, because the mean of its divisors is an integer number (6198338841).

Almost surely, 2^12396677681 is an apocalyptic number.

It is an amenable number.

12396677681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12396677681 is an equidigital number, since it uses as much as digits as its factorization.

12396677681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 56.

The spelling of 12396677681 in words is "twelve billion, three hundred ninety-six million, six hundred seventy-seven thousand, six hundred eighty-one".