198158700390 has 48 divisors (see below), whose sum is σ = 553226743152. Its totient is φ = 45293416896.

The previous prime is 198158700373. The next prime is 198158700449. The reversal of 198158700390 is 93007851891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67399449 + ... + 67402388.

It is an arithmetic number, because the mean of its divisors is an integer number (11525557149).

Almost surely, 2^198158700390 is an apocalyptic number.

198158700390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198158700390 is an abundant number, since it is smaller than the sum of its proper divisors (355068042762).

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

198158700390 is a wasteful number, since it uses less digits than its factorization.

198158700390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134801861 (or 134801854 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 198158700390 in words is "one hundred ninety-eight billion, one hundred fifty-eight million, seven hundred thousand, three hundred ninety".