634857860406 has 64 divisors (see below), whose sum is σ = 1584951307776. Its totient is φ = 164697196800.

The previous prime is 634857860393. The next prime is 634857860407. The reversal of 634857860406 is 604068758436.

634857860406 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634857860407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457575 + ... + 1216178.

It is an arithmetic number, because the mean of its divisors is an integer number (24764864184).

Almost surely, 2^634857860406 is an apocalyptic number.

634857860406 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

634857860406 is an abundant number, since it is smaller than the sum of its proper divisors (950093447370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634857860406 is a wasteful number, since it uses less digits than its factorization.

634857860406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674597.

The product of its (nonzero) digits is 23224320, while the sum is 57.

The spelling of 634857860406 in words is "six hundred thirty-four billion, eight hundred fifty-seven million, eight hundred sixty thousand, four hundred six".