2561540324 has 12 divisors (see below), whose sum is σ = 5123080704. Its totient is φ = 1097802984.

The previous prime is 2561540321. The next prime is 2561540329. The reversal of 2561540324 is 4230451652.

2561540324 is an admirable number.

It is a super-2 number, since 2×2561540324² = 13122977662956049952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2561540321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45741764 + ... + 45741819.

It is an arithmetic number, because the mean of its divisors is an integer number (426923392).

Almost surely, 2^2561540324 is an apocalyptic number.

It is an amenable number.

2561540324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2561540324 is a wasteful number, since it uses less digits than its factorization.

2561540324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91483594 (or 91483592 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 2561540324 is about 50611.6619367513. The cubic root of 2561540324 is about 1368.2550686851.

Adding to 2561540324 its reverse (4230451652), we get a palindrome (6791991976).

The spelling of 2561540324 in words is "two billion, five hundred sixty-one million, five hundred forty thousand, three hundred twenty-four".