3603731661 has 64 divisors (see below), whose sum is σ = 5781715200. Its totient is φ = 2213422848.

The previous prime is 3603731657. The next prime is 3603731669. The reversal of 3603731661 is 1661373063.

It is not a de Polignac number, because 3603731661 - 2² = 3603731657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3603731669) 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 63 ways as a sum of consecutive naturals, for example, 1534290 + ... + 1536636.

It is an arithmetic number, because the mean of its divisors is an integer number (90339300).

Almost surely, 2^3603731661 is an apocalyptic number.

It is an amenable number.

3603731661 is a deficient number, since it is larger than the sum of its proper divisors (2177983539).

3603731661 is a wasteful number, since it uses less digits than its factorization.

3603731661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 3603731661 is about 60031.0891205549. The cubic root of 3603731661 is about 1533.1482387738.

The spelling of 3603731661 in words is "three billion, six hundred three million, seven hundred thirty-one thousand, six hundred sixty-one".