12626401389 has 24 divisors (see below), whose sum is σ = 19588359168. Its totient is φ = 7213409280.

The previous prime is 12626401351. The next prime is 12626401391. The reversal of 12626401389 is 98310462621.

It is not a de Polignac number, because 12626401389 - 2⁸ = 12626401133 is a prime.

It is a super-2 number, since 2×12626401389² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12626401389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12626401349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914989 + ... + 928685.

It is an arithmetic number, because the mean of its divisors is an integer number (816181632).

Almost surely, 2^12626401389 is an apocalyptic number.

It is an amenable number.

12626401389 is a deficient number, since it is larger than the sum of its proper divisors (6961957779).

12626401389 is a wasteful number, since it uses less digits than its factorization.

12626401389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19985 (or 19978 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 12626401389 in words is "twelve billion, six hundred twenty-six million, four hundred one thousand, three hundred eighty-nine".