3525865641 has 9 divisors (see below), whose sum is σ = 5093174359. Its totient is φ = 2350458336.

The previous prime is 3525865639. The next prime is 3525865699. The reversal of 3525865641 is 1465685253.

The square root of 3525865641 is 59379.

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

3525865641 is a `hidden beast` number, since 3 + 5 + 2 + 5 + 86 + 564 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2833965225 + 691900416 = 53235^2 + 26304^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 3525865641 - 2¹ = 3525865639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3525865621) 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 in 8 ways as a sum of consecutive naturals, for example, 168241 + ... + 188033.

Almost surely, 2^3525865641 is an apocalyptic number.

3525865641 is the 59379-th square number.

3525865641 is the 29690-th centered octagonal number.

It is an amenable number.

3525865641 is a deficient number, since it is larger than the sum of its proper divisors (1567308718).

3525865641 is an frugal number, since it uses more digits than its factorization.

3525865641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39592 (or 19796 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The cubic root of 3525865641 is about 1522.0254682007.

The spelling of 3525865641 in words is "three billion, five hundred twenty-five million, eight hundred sixty-five thousand, six hundred forty-one".