2580747997 has 4 divisors (see below), whose sum is σ = 2590790076. Its totient is φ = 2570705920.

The previous prime is 2580747991. The next prime is 2580748013. The reversal of 2580747997 is 7997470852.

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 1215149881 + 1365598116 = 34859^2 + 36954^2 .

It is a cyclic number.

It is not a de Polignac number, because 2580747997 - 2¹¹ = 2580745949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580747991) 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, 5020654 + ... + 5021167.

It is an arithmetic number, because the mean of its divisors is an integer number (647697519).

Almost surely, 2^2580747997 is an apocalyptic number.

It is an amenable number.

2580747997 is a deficient number, since it is larger than the sum of its proper divisors (10042079).

2580747997 is a wasteful number, since it uses less digits than its factorization.

2580747997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10042078.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The square root of 2580747997 is about 50801.0629514777. The cubic root of 2580747997 is about 1371.6665029123. Note that the first 3 decimals are identical.

The spelling of 2580747997 in words is "two billion, five hundred eighty million, seven hundred forty-seven thousand, nine hundred ninety-seven".