12712278345 has 32 divisors (see below), whose sum is σ = 22610832384. Its totient is φ = 6056467200.

The previous prime is 12712278331. The next prime is 12712278353. The reversal of 12712278345 is 54387221721.

It is a happy number.

It is not a de Polignac number, because 12712278345 - 2⁶ = 12712278281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12712278297 and 12712278306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045426 + ... + 1057515.

It is an arithmetic number, because the mean of its divisors is an integer number (706588512).

Almost surely, 2^12712278345 is an apocalyptic number.

12712278345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12712278345 is a deficient number, since it is larger than the sum of its proper divisors (9898554039).

12712278345 is a wasteful number, since it uses less digits than its factorization.

12712278345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102993.

The product of its digits is 188160, while the sum is 42.

The spelling of 12712278345 in words is "twelve billion, seven hundred twelve million, two hundred seventy-eight thousand, three hundred forty-five".