626371172715397 has 2 divisors, whose sum is σ = 626371172715398. Its totient is φ = 626371172715396.

The previous prime is 626371172715383. The next prime is 626371172715551. The reversal of 626371172715397 is 793517271173626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571812725711236 + 54558447004161 = 23912606^2 + 7386369^2 .

It is a cyclic number.

It is not a de Polignac number, because 626371172715397 - 2⁷ = 626371172715269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626371172715697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313185586357698 + 313185586357699.

It is an arithmetic number, because the mean of its divisors is an integer number (313185586357699).

Almost surely, 2^{626371172715397} is an apocalyptic number.

It is an amenable number.

626371172715397 is a deficient number, since it is larger than the sum of its proper divisors (1).

626371172715397 is an equidigital number, since it uses as much as digits as its factorization.

626371172715397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140026320, while the sum is 67.

The spelling of 626371172715397 in words is "six hundred twenty-six trillion, three hundred seventy-one billion, one hundred seventy-two million, seven hundred fifteen thousand, three hundred ninety-seven".