12434278785 has 8 divisors (see below), whose sum is σ = 19894846080. Its totient is φ = 6631615344.

The previous prime is 12434278729. The next prime is 12434278811. The reversal of 12434278785 is 58787243421.

It is a happy number.

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

It is not a de Polignac number, because 12434278785 - 2⁷ = 12434278657 is a prime.

It is a super-2 number, since 2×12434278785² (a number of 21 digits) contains 22 as substring.

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, 414475945 + ... + 414475974.

It is an arithmetic number, because the mean of its divisors is an integer number (2486855760).

Almost surely, 2^12434278785 is an apocalyptic number.

12434278785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12434278785 is a deficient number, since it is larger than the sum of its proper divisors (7460567295).

12434278785 is an equidigital number, since it uses as much as digits as its factorization.

12434278785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828951927.

The product of its digits is 3010560, while the sum is 51.

The spelling of 12434278785 in words is "twelve billion, four hundred thirty-four million, two hundred seventy-eight thousand, seven hundred eighty-five".