198178813504 has 56 divisors (see below), whose sum is σ = 455130448640. Its totient is φ = 83858651136.

The previous prime is 198178813463. The next prime is 198178813507. The reversal of 198178813504 is 405318871891.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (198178813507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2764377 + ... + 2835160.

It is an arithmetic number, because the mean of its divisors is an integer number (8127329440).

Almost surely, 2^198178813504 is an apocalyptic number.

198178813504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

198178813504 is an abundant number, since it is smaller than the sum of its proper divisors (256951635136).

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

198178813504 is an equidigital number, since it uses as much as digits as its factorization.

198178813504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599635 (or 5599625 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 198178813504 in words is "one hundred ninety-eight billion, one hundred seventy-eight million, eight hundred thirteen thousand, five hundred four".