191918940704 has 24 divisors (see below), whose sum is σ = 377858145168. Its totient is φ = 95954967360.

The previous prime is 191918940679. The next prime is 191918940749. The reversal of 191918940704 is 407049819191.

It is a happy 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, 614159 + ... + 872369.

It is an arithmetic number, because the mean of its divisors is an integer number (15744089382).

Almost surely, 2^191918940704 is an apocalyptic number.

It is an amenable number.

191918940704 is a deficient number, since it is larger than the sum of its proper divisors (185939204464).

191918940704 is a wasteful number, since it uses less digits than its factorization.

191918940704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281448 (or 281440 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 53.

The spelling of 191918940704 in words is "one hundred ninety-one billion, nine hundred eighteen million, nine hundred forty thousand, seven hundred four".