191574286861 has 2 divisors, whose sum is σ = 191574286862. Its totient is φ = 191574286860.

The previous prime is 191574286829. The next prime is 191574286877. The reversal of 191574286861 is 168682475191.

191574286861 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 can be written as a sum of positive squares in only one way, i.e., 191379125961 + 195160900 = 437469^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 191574286861 - 2⁵ = 191574286829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191574286796 and 191574286805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191574286811) 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, 95787143430 + 95787143431.

It is an arithmetic number, because the mean of its divisors is an integer number (95787143431).

Almost surely, 2^191574286861 is an apocalyptic number.

It is an amenable number.

191574286861 is a deficient number, since it is larger than the sum of its proper divisors (1).

191574286861 is an equidigital number, since it uses as much as digits as its factorization.

191574286861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 58.

The spelling of 191574286861 in words is "one hundred ninety-one billion, five hundred seventy-four million, two hundred eighty-six thousand, eight hundred sixty-one".