12456790169 has 4 divisors (see below), whose sum is σ = 12457590144. Its totient is φ = 12455990196.

The previous prime is 12456790139. The next prime is 12456790189. The reversal of 12456790169 is 96109765421.

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 12456790169 - 2²⁸ = 12188354713 is a prime.

It is a super-2 number, since 2×12456790169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12456790139) 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, 376157 + ... + 407930.

It is an arithmetic number, because the mean of its divisors is an integer number (3114397536).

Almost surely, 2^12456790169 is an apocalyptic number.

It is an amenable number.

12456790169 is a deficient number, since it is larger than the sum of its proper divisors (799975).

12456790169 is an equidigital number, since it uses as much as digits as its factorization.

12456790169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799974.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 12456790169 in words is "twelve billion, four hundred fifty-six million, seven hundred ninety thousand, one hundred sixty-nine".