11951566847999 has 8 divisors (see below), whose sum is σ = 12474069772752. Its totient is φ = 11440063984960.

The previous prime is 11951566847971. The next prime is 11951566848019. The reversal of 11951566847999 is 99974866515911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11951566847999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11951566847399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2750013209 + ... + 2750017554.

It is an arithmetic number, because the mean of its divisors is an integer number (1559258721594).

Almost surely, 2^{11951566847999} is an apocalyptic number.

11951566847999 is a deficient number, since it is larger than the sum of its proper divisors (522502924753).

11951566847999 is an equidigital number, since it uses as much as digits as its factorization.

11951566847999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500030857.

The product of its digits is 1322697600, while the sum is 80.

The spelling of 11951566847999 in words is "eleven trillion, nine hundred fifty-one billion, five hundred sixty-six million, eight hundred forty-seven thousand, nine hundred ninety-nine".