3525486581 has 4 divisors (see below), whose sum is σ = 3525662700. Its totient is φ = 3525310464.

The previous prime is 3525486533. The next prime is 3525486583. The reversal of 3525486581 is 1856845253.

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 3092472100 + 433014481 = 55610^2 + 20809^2 .

It is a cyclic number.

It is not a de Polignac number, because 3525486581 - 2²² = 3521292277 is a prime.

It is a super-2 number, since 2×3525486581² = 24858111265622139122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3525486583) 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 in 3 ways as a sum of consecutive naturals, for example, 53516 + ... + 99573.

It is an arithmetic number, because the mean of its divisors is an integer number (881415675).

Almost surely, 2^3525486581 is an apocalyptic number.

It is an amenable number.

3525486581 is a deficient number, since it is larger than the sum of its proper divisors (176119).

3525486581 is a wasteful number, since it uses less digits than its factorization.

3525486581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176118.

The product of its digits is 1152000, while the sum is 47.

The square root of 3525486581 is about 59375.8080450279. The cubic root of 3525486581 is about 1521.9709227633.

The spelling of 3525486581 in words is "three billion, five hundred twenty-five million, four hundred eighty-six thousand, five hundred eighty-one".