634721134259 has 8 divisors (see below), whose sum is σ = 636137856000. Its totient is φ = 633304992456.

The previous prime is 634721134237. The next prime is 634721134279. The reversal of 634721134259 is 952431127436.

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 634721134259 - 2²⁰ = 634720085683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634721134279) 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, 2084534 + ... + 2369540.

It is an arithmetic number, because the mean of its divisors is an integer number (79517232000).

Almost surely, 2^634721134259 is an apocalyptic number.

634721134259 is a deficient number, since it is larger than the sum of its proper divisors (1416721741).

634721134259 is a wasteful number, since it uses less digits than its factorization.

634721134259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289969.

The product of its digits is 1088640, while the sum is 47.

The spelling of 634721134259 in words is "six hundred thirty-four billion, seven hundred twenty-one million, one hundred thirty-four thousand, two hundred fifty-nine".