634881494671 has 8 divisors (see below), whose sum is σ = 668347614320. Its totient is φ = 601420505472.

The previous prime is 634881494669. The next prime is 634881494677. The reversal of 634881494671 is 176494188436.

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 634881494671 - 2¹ = 634881494669 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 (634881494677) 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, 1027290 + ... + 1524823.

It is an arithmetic number, because the mean of its divisors is an integer number (83543451790).

Almost surely, 2^634881494671 is an apocalyptic number.

634881494671 is a deficient number, since it is larger than the sum of its proper divisors (33466119649).

634881494671 is a wasteful number, since it uses less digits than its factorization.

634881494671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565225.

The product of its digits is 27869184, while the sum is 61.

The spelling of 634881494671 in words is "six hundred thirty-four billion, eight hundred eighty-one million, four hundred ninety-four thousand, six hundred seventy-one".