12645390971 has 2 divisors, whose sum is σ = 12645390972. Its totient is φ = 12645390970.

The previous prime is 12645390943. The next prime is 12645391063. The reversal of 12645390971 is 17909354621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12645390971 - 2¹⁸ = 12645128827 is a prime.

It is a super-3 number, since 3×12645390971³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12645390941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322695485 + 6322695486.

It is an arithmetic number, because the mean of its divisors is an integer number (6322695486).

Almost surely, 2^12645390971 is an apocalyptic number.

12645390971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645390971 is an equidigital number, since it uses as much as digits as its factorization.

12645390971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 12645390971 in words is "twelve billion, six hundred forty-five million, three hundred ninety thousand, nine hundred seventy-one".