3544720656864 has 96 divisors (see below), whose sum is σ = 9356268579840. Its totient is φ = 1175067489792.

The previous prime is 3544720656857. The next prime is 3544720656901. The reversal of 3544720656864 is 4686560274453.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 3544720656798 and 3544720656807.

It is a congruent number.

It is an unprimeable number.

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, 12508162 + ... + 12788414.

It is an arithmetic number, because the mean of its divisors is an integer number (97461131040).

Almost surely, 2^{3544720656864} is an apocalyptic number.

It is an amenable number.

3544720656864 is an abundant number, since it is smaller than the sum of its proper divisors (5811547922976).

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

3544720656864 is a wasteful number, since it uses less digits than its factorization.

3544720656864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280992 (or 280984 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 60.

The spelling of 3544720656864 in words is "three trillion, five hundred forty-four billion, seven hundred twenty million, six hundred fifty-six thousand, eight hundred sixty-four".