191063551985473 has 2 divisors, whose sum is σ = 191063551985474. Its totient is φ = 191063551985472.

The previous prime is 191063551985429. The next prime is 191063551985503. The reversal of 191063551985473 is 374589155360191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187111539192384 + 3952012793089 = 13678872^2 + 1987967^2 .

It is a cyclic number.

It is not a de Polignac number, because 191063551985473 - 2⁴⁵ = 155879179896641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191063551985399 and 191063551985408.

It is not a weakly prime, because it can be changed into another prime (191063551925473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95531775992736 + 95531775992737.

It is an arithmetic number, because the mean of its divisors is an integer number (95531775992737).

Almost surely, 2^{191063551985473} is an apocalyptic number.

It is an amenable number.

191063551985473 is a deficient number, since it is larger than the sum of its proper divisors (1).

191063551985473 is an equidigital number, since it uses as much as digits as its factorization.

191063551985473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472000, while the sum is 67.

The spelling of 191063551985473 in words is "one hundred ninety-one trillion, sixty-three billion, five hundred fifty-one million, nine hundred eighty-five thousand, four hundred seventy-three".