198297769488 has 80 divisors (see below), whose sum is σ = 630485229696. Its totient is φ = 52298311680.

The previous prime is 198297769487. The next prime is 198297769493. The reversal of 198297769488 is 884967792891.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is not an unprimeable number, because it can be changed into a prime (198297769487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22694553 + ... + 22703288.

Almost surely, 2^198297769488 is an apocalyptic number.

It is an amenable number.

198297769488 is an abundant number, since it is smaller than the sum of its proper divisors (432187460208).

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

198297769488 is a wasteful number, since it uses less digits than its factorization.

198297769488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45397872 (or 45397866 counting only the distinct ones).

The product of its digits is 877879296, while the sum is 78.

The spelling of 198297769488 in words is "one hundred ninety-eight billion, two hundred ninety-seven million, seven hundred sixty-nine thousand, four hundred eighty-eight".