191474628563 has 2 divisors, whose sum is σ = 191474628564. Its totient is φ = 191474628562.

The previous prime is 191474628547. The next prime is 191474628581. The reversal of 191474628563 is 365826474191.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (365826474191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191474628563 - 2⁴ = 191474628547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191474628499 and 191474628508.

It is not a weakly prime, because it can be changed into another prime (191474628503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95737314281 + 95737314282.

It is an arithmetic number, because the mean of its divisors is an integer number (95737314282).

Almost surely, 2^191474628563 is an apocalyptic number.

191474628563 is a deficient number, since it is larger than the sum of its proper divisors (1).

191474628563 is an equidigital number, since it uses as much as digits as its factorization.

191474628563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The spelling of 191474628563 in words is "one hundred ninety-one billion, four hundred seventy-four million, six hundred twenty-eight thousand, five hundred sixty-three".