198446257158 has 16 divisors (see below), whose sum is σ = 400017653760. Its totient is φ = 65627895816.

The previous prime is 198446257129. The next prime is 198446257171. The reversal of 198446257158 is 851752644891.

It is a congruent number.

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, 130213318 + ... + 130214841.

It is an arithmetic number, because the mean of its divisors is an integer number (25001103360).

Almost surely, 2^198446257158 is an apocalyptic number.

198446257158 is an abundant number, since it is smaller than the sum of its proper divisors (201571396602).

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

198446257158 is a wasteful number, since it uses less digits than its factorization.

198446257158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260428291.

The product of its digits is 19353600, while the sum is 60.

The spelling of 198446257158 in words is "one hundred ninety-eight billion, four hundred forty-six million, two hundred fifty-seven thousand, one hundred fifty-eight".