198651231044 has 48 divisors (see below), whose sum is σ = 429258412800. Its totient is φ = 80128218240.

The previous prime is 198651231043. The next prime is 198651231059. The reversal of 198651231044 is 440132156891.

It is a junction number, because it is equal to n+sod(n) for n = 198651230986 and 198651231004.

It is not an unprimeable number, because it can be changed into a prime (198651231043) 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, 4235192 + ... + 4281839.

It is an arithmetic number, because the mean of its divisors is an integer number (8942883600).

Almost surely, 2^198651231044 is an apocalyptic number.

198651231044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

198651231044 is an abundant number, since it is smaller than the sum of its proper divisors (230607181756).

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

198651231044 is a wasteful number, since it uses less digits than its factorization.

198651231044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517073 (or 8517057 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 198651231044 in words is "one hundred ninety-eight billion, six hundred fifty-one million, two hundred thirty-one thousand, forty-four".