2546320561 has 4 divisors (see below), whose sum is σ = 2555513332. Its totient is φ = 2537127792.

The previous prime is 2546320531. The next prime is 2546320589. The reversal of 2546320561 is 1650236452.

2546320561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 359822961 + 2186497600 = 18969^2 + 46760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2546320561 - 2⁷ = 2546320433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2546320531) 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, 4595970 + ... + 4596523.

It is an arithmetic number, because the mean of its divisors is an integer number (638878333).

Almost surely, 2^2546320561 is an apocalyptic number.

It is an amenable number.

2546320561 is a deficient number, since it is larger than the sum of its proper divisors (9192771).

2546320561 is an equidigital number, since it uses as much as digits as its factorization.

2546320561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9192770.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2546320561 is about 50461.0796654213. The cubic root of 2546320561 is about 1365.5397885701.

The spelling of 2546320561 in words is "two billion, five hundred forty-six million, three hundred twenty thousand, five hundred sixty-one".