635857425457 has 2 divisors, whose sum is σ = 635857425458. Its totient is φ = 635857425456.

The previous prime is 635857425449. The next prime is 635857425499. The reversal of 635857425457 is 754524758536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379999506481 + 255857918976 = 616441^2 + 505824^2 .

It is a cyclic number.

It is not a de Polignac number, because 635857425457 - 2³ = 635857425449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 635857425395 and 635857425404.

It is not a weakly prime, because it can be changed into another prime (635857422457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317928712728 + 317928712729.

It is an arithmetic number, because the mean of its divisors is an integer number (317928712729).

Almost surely, 2^635857425457 is an apocalyptic number.

It is an amenable number.

635857425457 is a deficient number, since it is larger than the sum of its proper divisors (1).

635857425457 is an equidigital number, since it uses as much as digits as its factorization.

635857425457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120000, while the sum is 61.

The spelling of 635857425457 in words is "six hundred thirty-five billion, eight hundred fifty-seven million, four hundred twenty-five thousand, four hundred fifty-seven".