198259396880 has 40 divisors (see below), whose sum is σ = 470760619392. Its totient is φ = 77616443264.

The previous prime is 198259396879. The next prime is 198259396891. The reversal of 198259396880 is 88693952891.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 198259396880.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26360522 + ... + 26368041.

Almost surely, 2^198259396880 is an apocalyptic number.

198259396880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198259396880 is an abundant number, since it is smaller than the sum of its proper divisors (272501222512).

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

198259396880 is a wasteful number, since it uses less digits than its factorization.

198259396880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52728623 (or 52728617 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 68.

The spelling of 198259396880 in words is "one hundred ninety-eight billion, two hundred fifty-nine million, three hundred ninety-six thousand, eight hundred eighty".