2105581776 has 40 divisors (see below), whose sum is σ = 5489336160. Its totient is φ = 695419776.

The previous prime is 2105581763. The next prime is 2105581781. The reversal of 2105581776 is 6771855012.

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, 195990 + ... + 206453.

It is an arithmetic number, because the mean of its divisors is an integer number (137233404).

Almost surely, 2^2105581776 is an apocalyptic number.

It is an amenable number.

2105581776 is an abundant number, since it is smaller than the sum of its proper divisors (3383754384).

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

2105581776 is a wasteful number, since it uses less digits than its factorization.

2105581776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402563 (or 402557 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 42.

The square root of 2105581776 is about 45886.6187030598. The cubic root of 2105581776 is about 1281.7127494902.

It can be divided in two parts, 21055 and 81776, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 2105581776 in words is "two billion, one hundred five million, five hundred eighty-one thousand, seven hundred seventy-six".