191004042044 has 12 divisors (see below), whose sum is σ = 339736698168. Its totient is φ = 93936414000.

The previous prime is 191004042001. The next prime is 191004042121. The reversal of 191004042044 is 440240400191.

It is a super-2 number, since 2×191004042044² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191004041998 and 191004042016.

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, 391401482 + ... + 391401969.

It is an arithmetic number, because the mean of its divisors is an integer number (28311391514).

Almost surely, 2^191004042044 is an apocalyptic number.

It is an amenable number.

191004042044 is a deficient number, since it is larger than the sum of its proper divisors (148732656124).

191004042044 is a wasteful number, since it uses less digits than its factorization.

191004042044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782803516 (or 782803514 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 191004042044 in words is "one hundred ninety-one billion, four million, forty-two thousand, forty-four".