11961048647 has 2 divisors, whose sum is σ = 11961048648. Its totient is φ = 11961048646.

The previous prime is 11961048629. The next prime is 11961048691. The reversal of 11961048647 is 74684016911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11961048647 - 2²⁰ = 11960000071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961047647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980524323 + 5980524324.

It is an arithmetic number, because the mean of its divisors is an integer number (5980524324).

Almost surely, 2^11961048647 is an apocalyptic number.

11961048647 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961048647 is an equidigital number, since it uses as much as digits as its factorization.

11961048647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 11961048647 in words is "eleven billion, nine hundred sixty-one million, forty-eight thousand, six hundred forty-seven".