12646455226 has 4 divisors (see below), whose sum is σ = 18969682842. Its totient is φ = 6323227612.

The previous prime is 12646455197. The next prime is 12646455251. The reversal of 12646455226 is 62255464621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11556465001 + 1089990225 = 107501^2 + 33015^2 .

It is a super-2 number, since 2×12646455226² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161613805 + ... + 3161613808.

Almost surely, 2^12646455226 is an apocalyptic number.

12646455226 is a deficient number, since it is larger than the sum of its proper divisors (6323227616).

12646455226 is an equidigital number, since it uses as much as digits as its factorization.

12646455226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323227615.

The product of its digits is 691200, while the sum is 43.

The spelling of 12646455226 in words is "twelve billion, six hundred forty-six million, four hundred fifty-five thousand, two hundred twenty-six".