634043020171 has 8 divisors (see below), whose sum is σ = 693280720944. Its totient is φ = 575071557120.

The previous prime is 634043020133. The next prime is 634043020213. The reversal of 634043020171 is 171020340436.

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 634043020171 - 2³⁵ = 599683281803 is a prime.

It is a super-2 number, since 2×634043020171² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634043023171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66554446 + ... + 66563971.

It is an arithmetic number, because the mean of its divisors is an integer number (86660090118).

Almost surely, 2^634043020171 is an apocalyptic number.

634043020171 is a deficient number, since it is larger than the sum of its proper divisors (59237700773).

634043020171 is a wasteful number, since it uses less digits than its factorization.

634043020171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133118861.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 634043020171 in words is "six hundred thirty-four billion, forty-three million, twenty thousand, one hundred seventy-one".