626313138257 has 2 divisors, whose sum is σ = 626313138258. Its totient is φ = 626313138256.

The previous prime is 626313138193. The next prime is 626313138259. The reversal of 626313138257 is 752831313626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609342604816 + 16970533441 = 780604^2 + 130271^2 .

It is a cyclic number.

It is not a de Polignac number, because 626313138257 - 2⁶ = 626313138193 is a prime.

Together with 626313138259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626313138259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313156569128 + 313156569129.

It is an arithmetic number, because the mean of its divisors is an integer number (313156569129).

Almost surely, 2^626313138257 is an apocalyptic number.

It is an amenable number.

626313138257 is a deficient number, since it is larger than the sum of its proper divisors (1).

626313138257 is an equidigital number, since it uses as much as digits as its factorization.

626313138257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The spelling of 626313138257 in words is "six hundred twenty-six billion, three hundred thirteen million, one hundred thirty-eight thousand, two hundred fifty-seven".