11191894547 has 2 divisors, whose sum is σ = 11191894548. Its totient is φ = 11191894546.

The previous prime is 11191894523. The next prime is 11191894559. The reversal of 11191894547 is 74549819111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11191894547 - 2¹⁰ = 11191893523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11191894495 and 11191894504.

It is not a weakly prime, because it can be changed into another prime (11191890547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595947273 + 5595947274.

It is an arithmetic number, because the mean of its divisors is an integer number (5595947274).

Almost surely, 2^11191894547 is an apocalyptic number.

11191894547 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191894547 is an equidigital number, since it uses as much as digits as its factorization.

11191894547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 50.

The spelling of 11191894547 in words is "eleven billion, one hundred ninety-one million, eight hundred ninety-four thousand, five hundred forty-seven".