2645838426 has 128 divisors (see below), whose sum is σ = 7041484800. Its totient is φ = 641986560.

The previous prime is 2645838413. The next prime is 2645838449. The reversal of 2645838426 is 6248385462.

2645838426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 638730 + ... + 642858.

It is an arithmetic number, because the mean of its divisors is an integer number (55011600).

Almost surely, 2^2645838426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645838426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3520742400).

2645838426 is an abundant number, since it is smaller than the sum of its proper divisors (4395646374).

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

2645838426 is a wasteful number, since it uses less digits than its factorization.

2645838426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244.

The product of its digits is 2211840, while the sum is 48.

The square root of 2645838426 is about 51437.7140432971. The cubic root of 2645838426 is about 1383.1027341105.

The spelling of 2645838426 in words is "two billion, six hundred forty-five million, eight hundred thirty-eight thousand, four hundred twenty-six".