2485715581 has 2 divisors, whose sum is σ = 2485715582. Its totient is φ = 2485715580.

The previous prime is 2485715543. The next prime is 2485715591. The reversal of 2485715581 is 1855175842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2076260356 + 409455225 = 45566^2 + 20235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2485715581 - 2⁹ = 2485715069 is a prime.

It is a super-2 number, since 2×2485715581² = 12357563899252335122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2485715521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1242857790 + 1242857791.

It is an arithmetic number, because the mean of its divisors is an integer number (1242857791).

Almost surely, 2^2485715581 is an apocalyptic number.

It is an amenable number.

2485715581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2485715581 is an equidigital number, since it uses as much as digits as its factorization.

2485715581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448000, while the sum is 46.

The square root of 2485715581 is about 49856.9511803520. The cubic root of 2485715581 is about 1354.6189441507.

The spelling of 2485715581 in words is "two billion, four hundred eighty-five million, seven hundred fifteen thousand, five hundred eighty-one".