191143293980 has 12 divisors (see below), whose sum is σ = 401400917400. Its totient is φ = 76457317584.

The previous prime is 191143293967. The next prime is 191143293997. The reversal of 191143293980 is 89392341191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778582330 + ... + 4778582369.

It is an arithmetic number, because the mean of its divisors is an integer number (33450076450).

Almost surely, 2^191143293980 is an apocalyptic number.

191143293980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191143293980 is an abundant number, since it is smaller than the sum of its proper divisors (210257623420).

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

191143293980 is a wasteful number, since it uses less digits than its factorization.

191143293980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557164708 (or 9557164706 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 191143293980 in words is "one hundred ninety-one billion, one hundred forty-three million, two hundred ninety-three thousand, nine hundred eighty".