198218911000 has 64 divisors (see below), whose sum is σ = 505998848160. Its totient is φ = 72079600000.

The previous prime is 198218910991. The next prime is 198218911013. The reversal of 198218911000 is 119812891.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 8998951 + ... + 9020950.

Almost surely, 2^198218911000 is an apocalyptic number.

198218911000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198218911000 is an abundant number, since it is smaller than the sum of its proper divisors (307779937160).

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

198218911000 is a wasteful number, since it uses less digits than its factorization.

198218911000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18019933 (or 18019919 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 40.

It can be divided in two parts, 19821891 and 1000, that added together give a palindrome (19822891).

The spelling of 198218911000 in words is "one hundred ninety-eight billion, two hundred eighteen million, nine hundred eleven thousand".