2105771406 has 64 divisors (see below), whose sum is σ = 4497984000. Its totient is φ = 655344000.

The previous prime is 2105771399. The next prime is 2105771407. The reversal of 2105771406 is 6041775012.

2105771406 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105771407) 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, 2564476 + ... + 2565296.

It is an arithmetic number, because the mean of its divisors is an integer number (70281000).

Almost surely, 2^2105771406 is an apocalyptic number.

2105771406 is an abundant number, since it is smaller than the sum of its proper divisors (2392212594).

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

2105771406 is a wasteful number, since it uses less digits than its factorization.

2105771406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 2105771406 is about 45888.6849452019. The cubic root of 2105771406 is about 1281.7512256167.

The spelling of 2105771406 in words is "two billion, one hundred five million, seven hundred seventy-one thousand, four hundred six".