191426726806 has 24 divisors (see below), whose sum is σ = 345538044720. Its totient is φ = 79211058192.

The previous prime is 191426726801. The next prime is 191426726819. The reversal of 191426726806 is 608627624191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191426726801) 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, 33675330 + ... + 33681013.

It is an arithmetic number, because the mean of its divisors is an integer number (14397418530).

Almost surely, 2^191426726806 is an apocalyptic number.

191426726806 is a deficient number, since it is larger than the sum of its proper divisors (154111317914).

191426726806 is a wasteful number, since it uses less digits than its factorization.

191426726806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67356388 (or 67356381 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 191426726806 in words is "one hundred ninety-one billion, four hundred twenty-six million, seven hundred twenty-six thousand, eight hundred six".