12951922517 has 2 divisors, whose sum is σ = 12951922518. Its totient is φ = 12951922516.

The previous prime is 12951922507. The next prime is 12951922601. The reversal of 12951922517 is 71522915921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10438504561 + 2513417956 = 102169^2 + 50134^2 .

It is a cyclic number.

It is not a de Polignac number, because 12951922517 - 2¹⁸ = 12951660373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12951922507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6475961258 + 6475961259.

It is an arithmetic number, because the mean of its divisors is an integer number (6475961259).

Almost surely, 2^12951922517 is an apocalyptic number.

It is an amenable number.

12951922517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12951922517 is an equidigital number, since it uses as much as digits as its factorization.

12951922517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 44.

The spelling of 12951922517 in words is "twelve billion, nine hundred fifty-one million, nine hundred twenty-two thousand, five hundred seventeen".