198834870786 has 64 divisors (see below), whose sum is σ = 418798771200. Its totient is φ = 62812702656.

The previous prime is 198834870761. The next prime is 198834870803. The reversal of 198834870786 is 687078438891.

198834870786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×198834870786⁴ (a number of 46 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 198834870786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6827925 + ... + 6856983.

It is an arithmetic number, because the mean of its divisors is an integer number (6543730800).

Almost surely, 2^198834870786 is an apocalyptic number.

198834870786 is an abundant number, since it is smaller than the sum of its proper divisors (219963900414).

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

198834870786 is a wasteful number, since it uses less digits than its factorization.

198834870786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29543.

The product of its (nonzero) digits is 130056192, while the sum is 69.

The spelling of 198834870786 in words is "one hundred ninety-eight billion, eight hundred thirty-four million, eight hundred seventy thousand, seven hundred eighty-six".