198677779231 has 8 divisors (see below), whose sum is σ = 198838766000. Its totient is φ = 198516847680.

The previous prime is 198677779169. The next prime is 198677779241. The reversal of 198677779231 is 132977776891.

198677779231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198677779231 - 2⁷ = 198677779103 is a prime.

It is a super-2 number, since 2×198677779231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198677779241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9879835 + ... + 9899923.

It is an arithmetic number, because the mean of its divisors is an integer number (24854845750).

Almost surely, 2^198677779231 is an apocalyptic number.

198677779231 is a deficient number, since it is larger than the sum of its proper divisors (160986769).

198677779231 is a wasteful number, since it uses less digits than its factorization.

198677779231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27609.

The product of its digits is 56010528, while the sum is 67.

The spelling of 198677779231 in words is "one hundred ninety-eight billion, six hundred seventy-seven million, seven hundred seventy-nine thousand, two hundred thirty-one".