3664555613550 has 144 divisors (see below), whose sum is σ = 10679062277520. Its totient is φ = 895554731520.

The previous prime is 3664555613549. The next prime is 3664555613581. The reversal of 3664555613550 is 553165554663.

3664555613550 is a `hidden beast` number, since 3 + 6 + 6 + 4 + 5 + 556 + 1 + 35 + 50 = 666.

3664555613550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1440159 + ... + 3066458.

It is an arithmetic number, because the mean of its divisors is an integer number (74160154705).

Almost surely, 2^{3664555613550} is an apocalyptic number.

3664555613550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3664555613550 is an abundant number, since it is smaller than the sum of its proper divisors (7014506663970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3664555613550 is a wasteful number, since it uses less digits than its factorization.

3664555613550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506787 (or 4506779 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 54.

The spelling of 3664555613550 in words is "three trillion, six hundred sixty-four billion, five hundred fifty-five million, six hundred thirteen thousand, five hundred fifty".