198551698492 has 48 divisors (see below), whose sum is σ = 421191707328. Its totient is φ = 79949168640.

The previous prime is 198551698453. The next prime is 198551698511. The reversal of 198551698492 is 294896155891.

198551698492 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 86809 + ... + 636112.

It is an arithmetic number, because the mean of its divisors is an integer number (8774827236).

Almost surely, 2^198551698492 is an apocalyptic number.

It is an amenable number.

198551698492 is an abundant number, since it is smaller than the sum of its proper divisors (222640008836).

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

198551698492 is a wasteful number, since it uses less digits than its factorization.

198551698492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723526 (or 723524 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 67.

The spelling of 198551698492 in words is "one hundred ninety-eight billion, five hundred fifty-one million, six hundred ninety-eight thousand, four hundred ninety-two".