191394892183553 has 2 divisors, whose sum is σ = 191394892183554. Its totient is φ = 191394892183552.

The previous prime is 191394892183357. The next prime is 191394892183601. The reversal of 191394892183553 is 355381298493191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185721620832784 + 5673271350769 = 13627972^2 + 2381863^2 .

It is a cyclic number.

It is not a de Polignac number, because 191394892183553 - 2⁴⁴ = 173802706139137 is a prime.

It is not a weakly prime, because it can be changed into another prime (191394892183853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95697446091776 + 95697446091777.

It is an arithmetic number, because the mean of its divisors is an integer number (95697446091777).

Almost surely, 2^{191394892183553} is an apocalyptic number.

It is an amenable number.

191394892183553 is a deficient number, since it is larger than the sum of its proper divisors (1).

191394892183553 is an equidigital number, since it uses as much as digits as its factorization.

191394892183553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 251942400, while the sum is 71.

The spelling of 191394892183553 in words is "one hundred ninety-one trillion, three hundred ninety-four billion, eight hundred ninety-two million, one hundred eighty-three thousand, five hundred fifty-three".