2644020026 has 4 divisors (see below), whose sum is σ = 3966030042. Its totient is φ = 1322010012.

The previous prime is 2644020023. The next prime is 2644020059. The reversal of 2644020026 is 6200204462.

2644020026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2499900001 + 144120025 = 49999^2 + 12005^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2644019977 and 2644020004.

It is not an unprimeable number, because it can be changed into a prime (2644020023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661005005 + ... + 661005008.

Almost surely, 2^2644020026 is an apocalyptic number.

2644020026 is a deficient number, since it is larger than the sum of its proper divisors (1322010016).

2644020026 is a wasteful number, since it uses less digits than its factorization.

2644020026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322010015.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 2644020026 is about 51420.0352586421. The cubic root of 2644020026 is about 1382.7858074261.

Adding to 2644020026 its reverse (6200204462), we get a palindrome (8844224488).

The spelling of 2644020026 in words is "two billion, six hundred forty-four million, twenty thousand, twenty-six".