191905429244 has 24 divisors (see below), whose sum is σ = 340083222528. Its totient is φ = 94745957040.

The previous prime is 191905429229. The next prime is 191905429253. The reversal of 191905429244 is 442924509191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 191905429192 and 191905429201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787994 + ... + 1002369.

It is an arithmetic number, because the mean of its divisors is an integer number (14170134272).

Almost surely, 2^191905429244 is an apocalyptic number.

It is an amenable number.

191905429244 is a deficient number, since it is larger than the sum of its proper divisors (148177793284).

191905429244 is a wasteful number, since it uses less digits than its factorization.

191905429244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790705 (or 1790703 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 191905429244 in words is "one hundred ninety-one billion, nine hundred five million, four hundred twenty-nine thousand, two hundred forty-four".