12640125263251 has 2 divisors, whose sum is σ = 12640125263252. Its totient is φ = 12640125263250.

The previous prime is 12640125263209. The next prime is 12640125263267. The reversal of 12640125263251 is 15236252104621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12640125263251 - 2¹⁹ = 12640124738963 is a prime.

It is not a weakly prime, because it can be changed into another prime (12640125260251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320062631625 + 6320062631626.

It is an arithmetic number, because the mean of its divisors is an integer number (6320062631626).

Almost surely, 2^{12640125263251} is an apocalyptic number.

12640125263251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640125263251 is an equidigital number, since it uses as much as digits as its factorization.

12640125263251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 12640125263251 its reverse (15236252104621), we get a palindrome (27876377367872).

The spelling of 12640125263251 in words is "twelve trillion, six hundred forty billion, one hundred twenty-five million, two hundred sixty-three thousand, two hundred fifty-one".