2530780561 has 4 divisors (see below), whose sum is σ = 2535228900. Its totient is φ = 2526332224.

The previous prime is 2530780529. The next prime is 2530780591. The reversal of 2530780561 is 1650870352.

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 448592400 + 2082188161 = 21180^2 + 45631^2 .

It is a cyclic number.

It is not a de Polignac number, because 2530780561 - 2⁵ = 2530780529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2530780561.

It is not an unprimeable number, because it can be changed into a prime (2530780591) 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, 2223316 + ... + 2224453.

It is an arithmetic number, because the mean of its divisors is an integer number (633807225).

Almost surely, 2^2530780561 is an apocalyptic number.

It is an amenable number.

2530780561 is a deficient number, since it is larger than the sum of its proper divisors (4448339).

2530780561 is an equidigital number, since it uses as much as digits as its factorization.

2530780561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448338.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 2530780561 is about 50306.8639551304. The cubic root of 2530780561 is about 1362.7561898080.

The spelling of 2530780561 in words is "two billion, five hundred thirty million, seven hundred eighty thousand, five hundred sixty-one".