11961930847 has 32 divisors (see below), whose sum is σ = 13353859584. Its totient is φ = 10663833600.

The previous prime is 11961930821. The next prime is 11961930863. The reversal of 11961930847 is 74803916911.

It is a cyclic number.

It is not a de Polignac number, because 11961930847 - 2²⁷ = 11827713119 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 11961930847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11961930887) 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 in 31 ways as a sum of consecutive naturals, for example, 7489453 + ... + 7491049.

It is an arithmetic number, because the mean of its divisors is an integer number (417308112).

Almost surely, 2^11961930847 is an apocalyptic number.

11961930847 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11961930847 is a deficient number, since it is larger than the sum of its proper divisors (1391928737).

11961930847 is a wasteful number, since it uses less digits than its factorization.

11961930847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 11961930847 in words is "eleven billion, nine hundred sixty-one million, nine hundred thirty thousand, eight hundred forty-seven".