659985042108 has 144 divisors (see below), whose sum is σ = 1850685849600. Its totient is φ = 182335224960.

The previous prime is 659985042103. The next prime is 659985042161. The reversal of 659985042108 is 801240589956.

It is a happy number.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659985042103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23299458 + ... + 23327766.

Almost surely, 2^659985042108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659985042108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925342924800).

659985042108 is an abundant number, since it is smaller than the sum of its proper divisors (1190700807492).

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

659985042108 is a wasteful number, since it uses less digits than its factorization.

659985042108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29640 (or 29631 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 659985042108 in words is "six hundred fifty-nine billion, nine hundred eighty-five million, forty-two thousand, one hundred eight".