191934739492 has 12 divisors (see below), whose sum is σ = 337162928256. Its totient is φ = 95602474280.

The previous prime is 191934739489. The next prime is 191934739517. The reversal of 191934739492 is 294937439191.

It is a self number, because there is not a number n which added to its sum of digits gives 191934739492.

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, 91222684 + ... + 91224787.

It is an arithmetic number, because the mean of its divisors is an integer number (28096910688).

Almost surely, 2^191934739492 is an apocalyptic number.

It is an amenable number.

191934739492 is a deficient number, since it is larger than the sum of its proper divisors (145228188764).

191934739492 is a wasteful number, since it uses less digits than its factorization.

191934739492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182447738 (or 182447736 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 61.

The spelling of 191934739492 in words is "one hundred ninety-one billion, nine hundred thirty-four million, seven hundred thirty-nine thousand, four hundred ninety-two".