634080870621 has 12 divisors (see below), whose sum is σ = 999157735680. Its totient is φ = 384291436680.

The previous prime is 634080870613. The next prime is 634080870677. The reversal of 634080870621 is 126078080436.

634080870621 is a `hidden beast` number, since 634 + 0 + 8 + 0 + 8 + 7 + 0 + 6 + 2 + 1 = 666.

It is not a de Polignac number, because 634080870621 - 2³ = 634080870613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634080870221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3202428541 + ... + 3202428738.

It is an arithmetic number, because the mean of its divisors is an integer number (83263144640).

Almost surely, 2^634080870621 is an apocalyptic number.

It is an amenable number.

634080870621 is a deficient number, since it is larger than the sum of its proper divisors (365076865059).

634080870621 is a wasteful number, since it uses less digits than its factorization.

634080870621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404857296 (or 6404857293 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 634080870621 in words is "six hundred thirty-four billion, eighty million, eight hundred seventy thousand, six hundred twenty-one".