635857425481 has 8 divisors (see below), whose sum is σ = 646542384264. Its totient is φ = 625180888320.

The previous prime is 635857425457. The next prime is 635857425499. The reversal of 635857425481 is 184524758536.

It can be written as a sum of positive squares in 4 ways, for example, as 27519823881 + 608337601600 = 165891^2 + 779960^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 635857425481 - 2⁵ = 635857425449 is a prime.

It is a super-2 number, since 2×635857425481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635857420481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953040 + ... + 2255233.

It is an arithmetic number, because the mean of its divisors is an integer number (80817798033).

Almost surely, 2^635857425481 is an apocalyptic number.

635857425481 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

635857425481 is a deficient number, since it is larger than the sum of its proper divisors (10684958783).

635857425481 is a wasteful number, since it uses less digits than its factorization.

635857425481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210811.

The product of its digits is 32256000, while the sum is 58.

The spelling of 635857425481 in words is "six hundred thirty-five billion, eight hundred fifty-seven million, four hundred twenty-five thousand, four hundred eighty-one".