3521591649 has 27 divisors (see below), whose sum is σ = 5160040977. Its totient is φ = 2314377000.

The previous prime is 3521591629. The next prime is 3521591687. The reversal of 3521591649 is 9461951253.

The square root of 3521591649 is 59343.

It is a perfect power (a square), and thus also a powerful number.

3521591649 is a `hidden beast` number, since 3 + 52 + 1 + 591 + 6 + 4 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3521591649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3521591629) 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 26 ways as a sum of consecutive naturals, for example, 23321724 + ... + 23321874.

Almost surely, 2^3521591649 is an apocalyptic number.

3521591649 is the 59343-rd square number.

3521591649 is the 29672-nd centered octagonal number.

It is an amenable number.

3521591649 is a deficient number, since it is larger than the sum of its proper divisors (1638449328).

3521591649 is an equidigital number, since it uses as much as digits as its factorization.

3521591649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 285 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The cubic root of 3521591649 is about 1521.4102287508.

The spelling of 3521591649 in words is "three billion, five hundred twenty-one million, five hundred ninety-one thousand, six hundred forty-nine".