3660543021644 has 24 divisors (see below), whose sum is σ = 6630549718800. Its totient is φ = 1766170808640.

The previous prime is 3660543021643. The next prime is 3660543021661. The reversal of 3660543021644 is 4461203450663.

It is a junction number, because it is equal to n+sod(n) for n = 3660543021595 and 3660543021604.

It is not an unprimeable number, because it can be changed into a prime (3660543021643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8612042 + ... + 9027089.

It is an arithmetic number, because the mean of its divisors is an integer number (276272904950).

Almost surely, 2^{3660543021644} is an apocalyptic number.

It is an amenable number.

3660543021644 is a deficient number, since it is larger than the sum of its proper divisors (2970006697156).

3660543021644 is a wasteful number, since it uses less digits than its factorization.

3660543021644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640953 (or 17640951 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 3660543021644 in words is "three trillion, six hundred sixty billion, five hundred forty-three million, twenty-one thousand, six hundred forty-four".