2505860081 has 2 divisors, whose sum is σ = 2505860082. Its totient is φ = 2505860080.

The previous prime is 2505860069. The next prime is 2505860141. The reversal of 2505860081 is 1800685052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2499100081 + 6760000 = 49991^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505860081 - 2¹⁸ = 2505597937 is a prime.

It is a super-2 number, since 2×2505860081² = 12558669491098653122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2505860381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252930040 + 1252930041.

It is an arithmetic number, because the mean of its divisors is an integer number (1252930041).

Almost surely, 2^2505860081 is an apocalyptic number.

It is an amenable number.

2505860081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505860081 is an equidigital number, since it uses as much as digits as its factorization.

2505860081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 2505860081 is about 50058.5665096395. The cubic root of 2505860081 is about 1358.2684279407.

The spelling of 2505860081 in words is "two billion, five hundred five million, eight hundred sixty thousand, eighty-one".