2126813866388 has 12 divisors (see below), whose sum is σ = 3721971621312. Its totient is φ = 1063393403160.

The previous prime is 2126813866361. The next prime is 2126813866399. The reversal of 2126813866388 is 8836683186212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2126813866388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3024620 + ... + 3660867.

It is an arithmetic number, because the mean of its divisors is an integer number (310164301776).

Almost surely, 2^{2126813866388} is an apocalyptic number.

It is an amenable number.

2126813866388 is a deficient number, since it is larger than the sum of its proper divisors (1595157754924).

2126813866388 is a wasteful number, since it uses less digits than its factorization.

2126813866388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765022 (or 6765020 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 62.

The spelling of 2126813866388 in words is "two trillion, one hundred twenty-six billion, eight hundred thirteen million, eight hundred sixty-six thousand, three hundred eighty-eight".