2581692481 has 2 divisors, whose sum is σ = 2581692482. Its totient is φ = 2581692480.

The previous prime is 2581692473. The next prime is 2581692499. The reversal of 2581692481 is 1842961852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1707011856 + 874680625 = 41316^2 + 29575^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581692481 - 2³ = 2581692473 is a prime.

It is a super-2 number, since 2×2581692481² = 13330272132903870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2581692461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290846240 + 1290846241.

It is an arithmetic number, because the mean of its divisors is an integer number (1290846241).

Almost surely, 2^2581692481 is an apocalyptic number.

It is an amenable number.

2581692481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581692481 is an equidigital number, since it uses as much as digits as its factorization.

2581692481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 2581692481 is about 50810.3580089729. The cubic root of 2581692481 is about 1371.8338134566.

The spelling of 2581692481 in words is "two billion, five hundred eighty-one million, six hundred ninety-two thousand, four hundred eighty-one".