12641890443 has 16 divisors (see below), whose sum is σ = 20745666816. Its totient is φ = 6668249760.

The previous prime is 12641890441. The next prime is 12641890451. The reversal of 12641890443 is 34409814621.

12641890443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12641890443 - 2¹ = 12641890441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12641890395 and 12641890404.

It is not an unprimeable number, because it can be changed into a prime (12641890441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23153373 + ... + 23153918.

It is an arithmetic number, because the mean of its divisors is an integer number (1296604176).

Almost surely, 2^12641890443 is an apocalyptic number.

12641890443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12641890443 is a deficient number, since it is larger than the sum of its proper divisors (8103776373).

12641890443 is a wasteful number, since it uses less digits than its factorization.

12641890443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46307314.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 12641890443 in words is "twelve billion, six hundred forty-one million, eight hundred ninety thousand, four hundred forty-three".