12756406785 has 16 divisors (see below), whose sum is σ = 20601003456. Its totient is φ = 6739832768.

The previous prime is 12756406753. The next prime is 12756406823. The reversal of 12756406785 is 58760465721.

It is a cyclic number.

It is not a de Polignac number, because 12756406785 - 2⁵ = 12756406753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972354 + ... + 3975563.

It is an arithmetic number, because the mean of its divisors is an integer number (1287562716).

Almost surely, 2^12756406785 is an apocalyptic number.

12756406785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12756406785 is a deficient number, since it is larger than the sum of its proper divisors (7844596671).

12756406785 is a wasteful number, since it uses less digits than its factorization.

12756406785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948032.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 12756406785 in words is "twelve billion, seven hundred fifty-six million, four hundred six thousand, seven hundred eighty-five".