12345556669 has 4 divisors (see below), whose sum is σ = 12347372896. Its totient is φ = 12343740444.

The previous prime is 12345556661. The next prime is 12345556681. The reversal of 12345556669 is 96665554321.

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.

It is a cyclic number.

It is not a de Polignac number, because 12345556669 - 2³ = 12345556661 is a prime.

It is a super-2 number, since 2×12345556669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345556661) 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, 897879 + ... + 911524.

It is an arithmetic number, because the mean of its divisors is an integer number (3086843224).

Almost surely, 2^12345556669 is an apocalyptic number.

It is an amenable number.

12345556669 is a deficient number, since it is larger than the sum of its proper divisors (1816227).

12345556669 is an equidigital number, since it uses as much as digits as its factorization.

12345556669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816226.

The product of its digits is 5832000, while the sum is 52.

The spelling of 12345556669 in words is "twelve billion, three hundred forty-five million, five hundred fifty-six thousand, six hundred sixty-nine".