2636636021226 has 24 divisors (see below), whose sum is σ = 5776899151140. Its totient is φ = 869003631936.

The previous prime is 2636636021209. The next prime is 2636636021251. The reversal of 2636636021226 is 6221206366362.

2636636021226 is a `hidden beast` number, since 2 + 6 + 3 + 6 + 6 + 3 + 602 + 12 + 26 = 666.

2636636021226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2579560422201 + 57075599025 = 1606101^2 + 238905^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 822918505 + ... + 822921708.

Almost surely, 2^{2636636021226} is an apocalyptic number.

2636636021226 is an abundant number, since it is smaller than the sum of its proper divisors (3140263129914).

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

2636636021226 is a wasteful number, since it uses less digits than its factorization.

2636636021226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645840310 (or 1645840307 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The spelling of 2636636021226 in words is "two trillion, six hundred thirty-six billion, six hundred thirty-six million, twenty-one thousand, two hundred twenty-six".