12779784694 has 8 divisors (see below), whose sum is σ = 19170841248. Its totient is φ = 6389504280.

The previous prime is 12779784673. The next prime is 12779784707. The reversal of 12779784694 is 49648797721.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150957 + ... + 219880.

It is an arithmetic number, because the mean of its divisors is an integer number (2396355156).

Almost surely, 2^12779784694 is an apocalyptic number.

12779784694 is a deficient number, since it is larger than the sum of its proper divisors (6391056554).

12779784694 is a wasteful number, since it uses less digits than its factorization.

12779784694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388070.

The product of its digits is 42674688, while the sum is 64.

The spelling of 12779784694 in words is "twelve billion, seven hundred seventy-nine million, seven hundred eighty-four thousand, six hundred ninety-four".