11997908782 has 8 divisors (see below), whose sum is σ = 18048728376. Its totient is φ = 5981665992.

The previous prime is 11997908779. The next prime is 11997908837. The reversal of 11997908782 is 28780979911.

11997908782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11997908782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8643333 + ... + 8644720.

It is an arithmetic number, because the mean of its divisors is an integer number (2256091047).

Almost surely, 2^11997908782 is an apocalyptic number.

11997908782 is a deficient number, since it is larger than the sum of its proper divisors (6050819594).

11997908782 is a wasteful number, since it uses less digits than its factorization.

11997908782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288402.

The product of its (nonzero) digits is 4572288, while the sum is 61.

The spelling of 11997908782 in words is "eleven billion, nine hundred ninety-seven million, nine hundred eight thousand, seven hundred eighty-two".