191577258860423 has 2 divisors, whose sum is σ = 191577258860424. Its totient is φ = 191577258860422.

The previous prime is 191577258860359. The next prime is 191577258860441. The reversal of 191577258860423 is 324068852775191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191577258860423 - 2⁶ = 191577258860359 is a prime.

It is a super-2 number, since 2×191577258860423² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191577258860483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95788629430211 + 95788629430212.

It is an arithmetic number, because the mean of its divisors is an integer number (95788629430212).

It is a 1-persistent number, because it is pandigital, but 2⋅191577258860423 = 383154517720846 is not.

Almost surely, 2^{191577258860423} is an apocalyptic number.

191577258860423 is a deficient number, since it is larger than the sum of its proper divisors (1).

191577258860423 is an equidigital number, since it uses as much as digits as its factorization.

191577258860423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 68.

The spelling of 191577258860423 in words is "one hundred ninety-one trillion, five hundred seventy-seven billion, two hundred fifty-eight million, eight hundred sixty thousand, four hundred twenty-three".