12640165297 has 2 divisors, whose sum is σ = 12640165298. Its totient is φ = 12640165296.

The previous prime is 12640165267. The next prime is 12640165303. The reversal of 12640165297 is 79256104621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7926518961 + 4713646336 = 89031^2 + 68656^2 .

It is a cyclic number.

It is not a de Polignac number, because 12640165297 - 2³¹ = 10492681649 is a prime.

It is a super-3 number, since 3×12640165297³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12640165267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320082648 + 6320082649.

It is an arithmetic number, because the mean of its divisors is an integer number (6320082649).

Almost surely, 2^12640165297 is an apocalyptic number.

It is an amenable number.

12640165297 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640165297 is an equidigital number, since it uses as much as digits as its factorization.

12640165297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 12640165297 in words is "twelve billion, six hundred forty million, one hundred sixty-five thousand, two hundred ninety-seven".