11778511847 has 2 divisors, whose sum is σ = 11778511848. Its totient is φ = 11778511846.

The previous prime is 11778511819. The next prime is 11778511861. The reversal of 11778511847 is 74811587711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11778511847 - 2³⁰ = 10704770023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11778511795 and 11778511804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11778511747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889255923 + 5889255924.

It is an arithmetic number, because the mean of its divisors is an integer number (5889255924).

Almost surely, 2^11778511847 is an apocalyptic number.

11778511847 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778511847 is an equidigital number, since it uses as much as digits as its factorization.

11778511847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 50.

The spelling of 11778511847 in words is "eleven billion, seven hundred seventy-eight million, five hundred eleven thousand, eight hundred forty-seven".