11979878786 has 8 divisors (see below), whose sum is σ = 18352154880. Its totient is φ = 5862493828.

The previous prime is 11979878783. The next prime is 11979878791. The reversal of 11979878786 is 68787897911.

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

It is not an unprimeable number, because it can be changed into a prime (11979878783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63722666 + ... + 63722853.

It is an arithmetic number, because the mean of its divisors is an integer number (2294019360).

Almost surely, 2^11979878786 is an apocalyptic number.

11979878786 is a deficient number, since it is larger than the sum of its proper divisors (6372276094).

11979878786 is a wasteful number, since it uses less digits than its factorization.

11979878786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127445568.

The product of its digits is 85349376, while the sum is 71.

The spelling of 11979878786 in words is "eleven billion, nine hundred seventy-nine million, eight hundred seventy-eight thousand, seven hundred eighty-six".