2643604026 has 64 divisors (see below), whose sum is σ = 6406579200. Its totient is φ = 710384256.

The previous prime is 2643604021. The next prime is 2643604043. The reversal of 2643604026 is 6204063462.

It is not an unprimeable number, because it can be changed into a prime (2643604021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99006 + ... + 122838.

It is an arithmetic number, because the mean of its divisors is an integer number (100102800).

Almost surely, 2^2643604026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2643604026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3203289600).

2643604026 is an abundant number, since it is smaller than the sum of its proper divisors (3762975174).

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

2643604026 is a wasteful number, since it uses less digits than its factorization.

2643604026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24003.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 2643604026 is about 51415.9899836617. The cubic root of 2643604026 is about 1382.7132828787.

Adding to 2643604026 its reverse (6204063462), we get a palindrome (8847667488).

The spelling of 2643604026 in words is "two billion, six hundred forty-three million, six hundred four thousand, twenty-six".