12689339799641 has 2 divisors, whose sum is σ = 12689339799642. Its totient is φ = 12689339799640.

The previous prime is 12689339799583. The next prime is 12689339799707. The reversal of 12689339799641 is 14699793398621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8533286750041 + 4156053049600 = 2921179^2 + 2038640^2 .

It is a cyclic number.

It is not a de Polignac number, because 12689339799641 - 2²² = 12689335605337 is a prime.

It is a super-2 number, since 2×12689339799641² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12689339739641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344669899820 + 6344669899821.

It is an arithmetic number, because the mean of its divisors is an integer number (6344669899821).

Almost surely, 2^{12689339799641} is an apocalyptic number.

It is an amenable number.

12689339799641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12689339799641 is an equidigital number, since it uses as much as digits as its factorization.

12689339799641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952342272, while the sum is 77.

The spelling of 12689339799641 in words is "twelve trillion, six hundred eighty-nine billion, three hundred thirty-nine million, seven hundred ninety-nine thousand, six hundred forty-one".