813425911657 has 2 divisors, whose sum is σ = 813425911658. Its totient is φ = 813425911656.

The previous prime is 813425911619. The next prime is 813425911667. The reversal of 813425911657 is 756119524318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705223730176 + 108202181481 = 839776^2 + 328941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813425911657 is a prime.

It is not a weakly prime, because it can be changed into another prime (813425911607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406712955828 + 406712955829.

It is an arithmetic number, because the mean of its divisors is an integer number (406712955829).

Almost surely, 2^813425911657 is an apocalyptic number.

It is an amenable number.

813425911657 is a deficient number, since it is larger than the sum of its proper divisors (1).

813425911657 is an equidigital number, since it uses as much as digits as its factorization.

813425911657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The spelling of 813425911657 in words is "eight hundred thirteen billion, four hundred twenty-five million, nine hundred eleven thousand, six hundred fifty-seven".