625840363048657 has 2 divisors, whose sum is σ = 625840363048658. Its totient is φ = 625840363048656.

The previous prime is 625840363048517. The next prime is 625840363048717. The reversal of 625840363048657 is 756840363048526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426049601258961 + 199790761789696 = 20640969^2 + 14134736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625840363048657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 625840363048592 and 625840363048601.

It is not a weakly prime, because it can be changed into another prime (625840363048157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312920181524328 + 312920181524329.

It is an arithmetic number, because the mean of its divisors is an integer number (312920181524329).

Almost surely, 2^{625840363048657} is an apocalyptic number.

It is an amenable number.

625840363048657 is a deficient number, since it is larger than the sum of its proper divisors (1).

625840363048657 is an equidigital number, since it uses as much as digits as its factorization.

625840363048657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 696729600, while the sum is 67.

The spelling of 625840363048657 in words is "six hundred twenty-five trillion, eight hundred forty billion, three hundred sixty-three million, forty-eight thousand, six hundred fifty-seven".