12278387069 has 4 divisors (see below), whose sum is σ = 13222878396. Its totient is φ = 11333895744.

The previous prime is 12278387057. The next prime is 12278387083. The reversal of 12278387069 is 96078387221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96078387221 = 90527 ⋅1061323.

It can be written as a sum of positive squares in 2 ways, for example, as 7994684569 + 4283702500 = 89413^2 + 65450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278387069 is a prime.

It is a super-2 number, since 2×12278387069² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12278387069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278387269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472245644 + ... + 472245669.

It is an arithmetic number, because the mean of its divisors is an integer number (3305719599).

Almost surely, 2^12278387069 is an apocalyptic number.

It is an amenable number.

12278387069 is a deficient number, since it is larger than the sum of its proper divisors (944491327).

12278387069 is an equidigital number, since it uses as much as digits as its factorization.

12278387069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944491326.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 12278387069 in words is "twelve billion, two hundred seventy-eight million, three hundred eighty-seven thousand, sixty-nine".