11981863715767 has 8 divisors (see below), whose sum is σ = 13759077951360. Its totient is φ = 10319308463160.

The previous prime is 11981863715749. The next prime is 11981863715837. The reversal of 11981863715767 is 76751736818911.

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

It is a cyclic number.

It is not a de Polignac number, because 11981863715767 - 2⁷ = 11981863715639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11981863715696 and 11981863715705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981863715707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28664745523 + ... + 28664745940.

It is an arithmetic number, because the mean of its divisors is an integer number (1719884743920).

Almost surely, 2^{11981863715767} is an apocalyptic number.

11981863715767 is a deficient number, since it is larger than the sum of its proper divisors (1777214235593).

11981863715767 is a wasteful number, since it uses less digits than its factorization.

11981863715767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57329491493.

The product of its digits is 106686720, while the sum is 70.

The spelling of 11981863715767 in words is "eleven trillion, nine hundred eighty-one billion, eight hundred sixty-three million, seven hundred fifteen thousand, seven hundred sixty-seven".