191866343054 has 16 divisors (see below), whose sum is σ = 298887946368. Its totient is φ = 92303624952.

The previous prime is 191866343047. The next prime is 191866343057. The reversal of 191866343054 is 450343668191.

It is a junction number, because it is equal to n+sod(n) for n = 191866342993 and 191866343011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191866343057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16643522 + ... + 16655045.

It is an arithmetic number, because the mean of its divisors is an integer number (18680496648).

Almost surely, 2^191866343054 is an apocalyptic number.

191866343054 is a deficient number, since it is larger than the sum of its proper divisors (107021603314).

191866343054 is a wasteful number, since it uses less digits than its factorization.

191866343054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33298679.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 191866343054 in words is "one hundred ninety-one billion, eight hundred sixty-six million, three hundred forty-three thousand, fifty-four".