2561827732 has 6 divisors (see below), whose sum is σ = 4483198538. Its totient is φ = 1280913864.

The previous prime is 2561827729. The next prime is 2561827739. The reversal of 2561827732 is 2377281652.

It can be written as a sum of positive squares in only one way, i.e., 1685430916 + 876396816 = 41054^2 + 29604^2 .

It is a super-2 number, since 2×2561827732² = 13125922656888527648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561827739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320228463 + ... + 320228470.

Almost surely, 2^2561827732 is an apocalyptic number.

It is an amenable number.

2561827732 is a deficient number, since it is larger than the sum of its proper divisors (1921370806).

2561827732 is a wasteful number, since it uses less digits than its factorization.

2561827732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640456937 (or 640456935 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 2561827732 is about 50614.5012027186. The cubic root of 2561827732 is about 1368.3062400763.

The spelling of 2561827732 in words is "two billion, five hundred sixty-one million, eight hundred twenty-seven thousand, seven hundred thirty-two".