655444613663 has 8 divisors (see below), whose sum is σ = 764366896800. Its totient is φ = 561809668560.

The previous prime is 655444613597. The next prime is 655444613741. The reversal of 655444613663 is 366316444556.

655444613663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655444613663 - 2¹⁰ = 655444612639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655444613063) 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, 955458278 + ... + 955458963.

It is an arithmetic number, because the mean of its divisors is an integer number (95545862100).

Almost surely, 2^655444613663 is an apocalyptic number.

655444613663 is a deficient number, since it is larger than the sum of its proper divisors (108922283137).

655444613663 is an equidigital number, since it uses as much as digits as its factorization.

655444613663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910917262 (or 1910917248 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 53.

The spelling of 655444613663 in words is "six hundred fifty-five billion, four hundred forty-four million, six hundred thirteen thousand, six hundred sixty-three".