634681302885 has 48 divisors (see below), whose sum is σ = 1258328058624. Its totient is φ = 289896650496.

The previous prime is 634681302883. The next prime is 634681302907. The reversal of 634681302885 is 588203186436.

634681302885 is a `hidden beast` number, since 6 + 346 + 8 + 13 + 0 + 288 + 5 = 666.

It is not a de Polignac number, because 634681302885 - 2¹ = 634681302883 is a prime.

It is a super-2 number, since 2×634681302885² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634681302883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 468657 + ... + 1220246.

It is an arithmetic number, because the mean of its divisors is an integer number (26215167888).

Almost surely, 2^634681302885 is an apocalyptic number.

It is an amenable number.

634681302885 is a deficient number, since it is larger than the sum of its proper divisors (623646755739).

634681302885 is a wasteful number, since it uses less digits than its factorization.

634681302885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690114 (or 1690111 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 634681302885 in words is "six hundred thirty-four billion, six hundred eighty-one million, three hundred two thousand, eight hundred eighty-five".