12278364731 has 2 divisors, whose sum is σ = 12278364732. Its totient is φ = 12278364730.

The previous prime is 12278364719. The next prime is 12278364793. The reversal of 12278364731 is 13746387221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278364731 is a prime.

It is a super-2 number, since 2×12278364731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12278364031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139182365 + 6139182366.

It is an arithmetic number, because the mean of its divisors is an integer number (6139182366).

Almost surely, 2^12278364731 is an apocalyptic number.

12278364731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278364731 is an equidigital number, since it uses as much as digits as its factorization.

12278364731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The spelling of 12278364731 in words is "twelve billion, two hundred seventy-eight million, three hundred sixty-four thousand, seven hundred thirty-one".