2566819783 has 16 divisors (see below), whose sum is σ = 3067126560. Its totient is φ = 2120473600.

The previous prime is 2566819771. The next prime is 2566819813. The reversal of 2566819783 is 3879186652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2566819783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566819753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231238 + ... + 242083.

It is an arithmetic number, because the mean of its divisors is an integer number (191695410).

Almost surely, 2^2566819783 is an apocalyptic number.

2566819783 is a deficient number, since it is larger than the sum of its proper divisors (500306777).

2566819783 is a wasteful number, since it uses less digits than its factorization.

2566819783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473378.

The product of its digits is 4354560, while the sum is 55.

The square root of 2566819783 is about 50663.7916366314. The cubic root of 2566819783 is about 1369.1944369995.

It can be divided in two parts, 25668 and 19783, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 2566819783 in words is "two billion, five hundred sixty-six million, eight hundred nineteen thousand, seven hundred eighty-three".