2581120049 has 2 divisors, whose sum is σ = 2581120050. Its totient is φ = 2581120048.

The previous prime is 2581120043. The next prime is 2581120169. The reversal of 2581120049 is 9400211852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2473271824 + 107848225 = 49732^2 + 10385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581120049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2581119997 and 2581120024.

It is not a weakly prime, because it can be changed into another prime (2581120043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290560024 + 1290560025.

It is an arithmetic number, because the mean of its divisors is an integer number (1290560025).

Almost surely, 2^2581120049 is an apocalyptic number.

It is an amenable number.

2581120049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581120049 is an equidigital number, since it uses as much as digits as its factorization.

2581120049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 2581120049 is about 50804.7246720224. The cubic root of 2581120049 is about 1371.7324149069.

The spelling of 2581120049 in words is "two billion, five hundred eighty-one million, one hundred twenty thousand, forty-nine".