12615237997 has 2 divisors, whose sum is σ = 12615237998. Its totient is φ = 12615237996.

The previous prime is 12615237989. The next prime is 12615238019. The reversal of 12615237997 is 79973251621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8818336836 + 3796901161 = 93906^2 + 61619^2 .

It is a cyclic number.

It is not a de Polignac number, because 12615237997 - 2³ = 12615237989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12615237917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307618998 + 6307618999.

It is an arithmetic number, because the mean of its divisors is an integer number (6307618999).

Almost surely, 2^12615237997 is an apocalyptic number.

It is an amenable number.

12615237997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12615237997 is an equidigital number, since it uses as much as digits as its factorization.

12615237997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 52.

The spelling of 12615237997 in words is "twelve billion, six hundred fifteen million, two hundred thirty-seven thousand, nine hundred ninety-seven".