12125426646 has 16 divisors (see below), whose sum is σ = 24648409008. Its totient is φ = 3975549600.

The previous prime is 12125426641. The next prime is 12125426711. The reversal of 12125426646 is 64662452121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125426641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16564425 + ... + 16565156.

It is an arithmetic number, because the mean of its divisors is an integer number (1540525563).

Almost surely, 2^12125426646 is an apocalyptic number.

12125426646 is an abundant number, since it is smaller than the sum of its proper divisors (12522982362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12125426646 is a wasteful number, since it uses less digits than its factorization.

12125426646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33129647.

The product of its digits is 138240, while the sum is 39.

Adding to 12125426646 its reverse (64662452121), we get a palindrome (76787878767).

The spelling of 12125426646 in words is "twelve billion, one hundred twenty-five million, four hundred twenty-six thousand, six hundred forty-six".