12276569649 has 4 divisors (see below), whose sum is σ = 16368759536. Its totient is φ = 8184379764.

The previous prime is 12276569639. The next prime is 12276569659. The reversal of 12276569649 is 94696567221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94696567221 = 3 ⋅31565522407.

It is an interprime number because it is at equal distance from previous prime (12276569639) and next prime (12276569659).

It is not a de Polignac number, because 12276569649 - 2³¹ = 10129086001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12276569629) 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, 2046094939 + ... + 2046094944.

It is an arithmetic number, because the mean of its divisors is an integer number (4092189884).

Almost surely, 2^12276569649 is an apocalyptic number.

It is an amenable number.

12276569649 is a deficient number, since it is larger than the sum of its proper divisors (4092189887).

12276569649 is an equidigital number, since it uses as much as digits as its factorization.

12276569649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092189886.

The product of its digits is 9797760, while the sum is 57.

The spelling of 12276569649 in words is "twelve billion, two hundred seventy-six million, five hundred sixty-nine thousand, six hundred forty-nine".