191793420801 has 12 divisors (see below), whose sum is σ = 277828742100. Its totient is φ = 127495910880.

The previous prime is 191793420743. The next prime is 191793420803. The reversal of 191793420801 is 108024397191.

It can be written as a sum of positive squares in 2 ways, for example, as 105885810801 + 85907610000 = 325401^2 + 293100^2 .

It is not a de Polignac number, because 191793420801 - 2¹³ = 191793412609 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (191793420803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30527490 + ... + 30533771.

It is an arithmetic number, because the mean of its divisors is an integer number (23152395175).

Almost surely, 2^191793420801 is an apocalyptic number.

It is an amenable number.

191793420801 is a deficient number, since it is larger than the sum of its proper divisors (86035321299).

191793420801 is a wasteful number, since it uses less digits than its factorization.

191793420801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61061616 (or 61061613 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 191793420801 in words is "one hundred ninety-one billion, seven hundred ninety-three million, four hundred twenty thousand, eight hundred one".