2582650781 has 2 divisors, whose sum is σ = 2582650782. Its totient is φ = 2582650780.

The previous prime is 2582650769. The next prime is 2582650783. The reversal of 2582650781 is 1870562852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1824144100 + 758506681 = 42710^2 + 27541^2 .

It is a cyclic number.

It is not a de Polignac number, because 2582650781 - 2¹⁰ = 2582649757 is a prime.

It is a super-2 number, since 2×2582650781² = 13340170113199819922, which contains 22 as substring.

Together with 2582650783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2582650783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1291325390 + 1291325391.

It is an arithmetic number, because the mean of its divisors is an integer number (1291325391).

Almost surely, 2^2582650781 is an apocalyptic number.

It is an amenable number.

2582650781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2582650781 is an equidigital number, since it uses as much as digits as its factorization.

2582650781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 2582650781 is about 50819.7872978626. The cubic root of 2582650781 is about 1372.0035297348.

The spelling of 2582650781 in words is "two billion, five hundred eighty-two million, six hundred fifty thousand, seven hundred eighty-one".