191559926423 has 2 divisors, whose sum is σ = 191559926424. Its totient is φ = 191559926422.

The previous prime is 191559926333. The next prime is 191559926461. The reversal of 191559926423 is 324629955191.

191559926423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191559926423 - 2³⁶ = 122840449687 is a prime.

It is a super-2 number, since 2×191559926423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191559926323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95779963211 + 95779963212.

It is an arithmetic number, because the mean of its divisors is an integer number (95779963212).

Almost surely, 2^191559926423 is an apocalyptic number.

191559926423 is a deficient number, since it is larger than the sum of its proper divisors (1).

191559926423 is an equidigital number, since it uses as much as digits as its factorization.

191559926423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 56.

The spelling of 191559926423 in words is "one hundred ninety-one billion, five hundred fifty-nine million, nine hundred twenty-six thousand, four hundred twenty-three".