12784823742 has 16 divisors (see below), whose sum is σ = 25577327232. Its totient is φ = 4260327960.

The previous prime is 12784823731. The next prime is 12784823767. The reversal of 12784823742 is 24732848721.

It is a happy number.

It is a super-2 number, since 2×12784823742² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12784823691 and 12784823700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298234 + ... + 338397.

It is an arithmetic number, because the mean of its divisors is an integer number (1598582952).

Almost surely, 2^12784823742 is an apocalyptic number.

12784823742 is an abundant number, since it is smaller than the sum of its proper divisors (12792503490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12784823742 is a wasteful number, since it uses less digits than its factorization.

12784823742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639983.

The product of its digits is 1204224, while the sum is 48.

The spelling of 12784823742 in words is "twelve billion, seven hundred eighty-four million, eight hundred twenty-three thousand, seven hundred forty-two".