3661553441 has 16 divisors (see below), whose sum is σ = 4743715200. Its totient is φ = 2744575488.

The previous prime is 3661553321. The next prime is 3661553443. The reversal of 3661553441 is 1443551663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3661553441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3661553395 and 3661553404.

It is not an unprimeable number, because it can be changed into a prime (3661553443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057136 + ... + 1060593.

It is an arithmetic number, because the mean of its divisors is an integer number (296482200).

Almost surely, 2^3661553441 is an apocalyptic number.

It is an amenable number.

3661553441 is a deficient number, since it is larger than the sum of its proper divisors (1082161759).

3661553441 is a wasteful number, since it uses less digits than its factorization.

3661553441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117768.

The product of its digits is 129600, while the sum is 38.

The square root of 3661553441 is about 60510.7712808224. The cubic root of 3661553441 is about 1541.3045449332.

The spelling of 3661553441 in words is "three billion, six hundred sixty-one million, five hundred fifty-three thousand, four hundred forty-one".