2605857860838 has 16 divisors (see below), whose sum is σ = 5211737015040. Its totient is φ = 868615738056.

The previous prime is 2605857860819. The next prime is 2605857860863. The reversal of 2605857860838 is 8380687585062.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018623 + ... + 2499861.

It is an arithmetic number, because the mean of its divisors is an integer number (325733563440).

Almost surely, 2^{2605857860838} is an apocalyptic number.

2605857860838 is an abundant number, since it is smaller than the sum of its proper divisors (2605879154202).

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

2605857860838 is a wasteful number, since it uses less digits than its factorization.

2605857860838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774451.

The product of its (nonzero) digits is 154828800, while the sum is 66.

The spelling of 2605857860838 in words is "two trillion, six hundred five billion, eight hundred fifty-seven million, eight hundred sixty thousand, eight hundred thirty-eight".