17680638872 has 16 divisors (see below), whose sum is σ = 35701290240. Its totient is φ = 8160294816.

The previous prime is 17680638869. The next prime is 17680638947. The reversal of 17680638872 is 27883608671.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85002968 + ... + 85003175.

It is an arithmetic number, because the mean of its divisors is an integer number (2231330640).

Almost surely, 2^17680638872 is an apocalyptic number.

It is an amenable number.

17680638872 is an abundant number, since it is smaller than the sum of its proper divisors (18020651368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17680638872 is a wasteful number, since it uses less digits than its factorization.

17680638872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170006162 (or 170006158 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 17680638872 in words is "seventeen billion, six hundred eighty million, six hundred thirty-eight thousand, eight hundred seventy-two".