191143863852 has 48 divisors (see below), whose sum is σ = 461158656000. Its totient is φ = 61556302080.

The previous prime is 191143863847. The next prime is 191143863863. The reversal of 191143863852 is 258368341191.

It is a junction number, because it is equal to n+sod(n) for n = 191143863795 and 191143863804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206077 + ... + 651732.

It is an arithmetic number, because the mean of its divisors is an integer number (9607472000).

Almost surely, 2^191143863852 is an apocalyptic number.

191143863852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191143863852 is an abundant number, since it is smaller than the sum of its proper divisors (270014792148).

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

191143863852 is a wasteful number, since it uses less digits than its factorization.

191143863852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858446 (or 858444 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The spelling of 191143863852 in words is "one hundred ninety-one billion, one hundred forty-three million, eight hundred sixty-three thousand, eight hundred fifty-two".