198539585660 has 48 divisors (see below), whose sum is σ = 449469806016. Its totient is φ = 73231022592.

The previous prime is 198539585659. The next prime is 198539585749. The reversal of 198539585660 is 66585935891.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143417 + ... + 646256.

It is an arithmetic number, because the mean of its divisors is an integer number (9363954292).

Almost surely, 2^198539585660 is an apocalyptic number.

198539585660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198539585660 is an abundant number, since it is smaller than the sum of its proper divisors (250930220356).

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

198539585660 is a wasteful number, since it uses less digits than its factorization.

198539585660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790662 (or 790660 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 65.

The spelling of 198539585660 in words is "one hundred ninety-eight billion, five hundred thirty-nine million, five hundred eighty-five thousand, six hundred sixty".