12278203747 has 4 divisors (see below), whose sum is σ = 12301680760. Its totient is φ = 12254726736.

The previous prime is 12278203733. The next prime is 12278203771. The reversal of 12278203747 is 74730287221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74730287221 = 13681 ⋅5462341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278203747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278203447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11737722 + ... + 11738767.

It is an arithmetic number, because the mean of its divisors is an integer number (3075420190).

Almost surely, 2^12278203747 is an apocalyptic number.

12278203747 is a deficient number, since it is larger than the sum of its proper divisors (23477013).

12278203747 is an equidigital number, since it uses as much as digits as its factorization.

12278203747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23477012.

The product of its (nonzero) digits is 263424, while the sum is 43.

The spelling of 12278203747 in words is "twelve billion, two hundred seventy-eight million, two hundred three thousand, seven hundred forty-seven".