634821328127 has 8 divisors (see below), whose sum is σ = 725795856000. Its totient is φ = 543918241944.

The previous prime is 634821328117. The next prime is 634821328151. The reversal of 634821328127 is 721823128436.

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

It is not a de Polignac number, because 634821328127 - 2⁸ = 634821327871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634821328117) 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, 17841377 + ... + 17876922.

It is an arithmetic number, because the mean of its divisors is an integer number (90724482000).

Almost surely, 2^634821328127 is an apocalyptic number.

634821328127 is a deficient number, since it is larger than the sum of its proper divisors (90974527873).

634821328127 is a wasteful number, since it uses less digits than its factorization.

634821328127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35720845.

The product of its digits is 774144, while the sum is 47.

The spelling of 634821328127 in words is "six hundred thirty-four billion, eight hundred twenty-one million, three hundred twenty-eight thousand, one hundred twenty-seven".