12969961651 has 2 divisors, whose sum is σ = 12969961652. Its totient is φ = 12969961650.

The previous prime is 12969961643. The next prime is 12969961663. The reversal of 12969961651 is 15616996921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12969961651 - 2³ = 12969961643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12969961592 and 12969961601.

It is not a weakly prime, because it can be changed into another prime (12969961951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6484980825 + 6484980826.

It is an arithmetic number, because the mean of its divisors is an integer number (6484980826).

Almost surely, 2^12969961651 is an apocalyptic number.

12969961651 is a deficient number, since it is larger than the sum of its proper divisors (1).

12969961651 is an equidigital number, since it uses as much as digits as its factorization.

12969961651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 55.

The spelling of 12969961651 in words is "twelve billion, nine hundred sixty-nine million, nine hundred sixty-one thousand, six hundred fifty-one".