655646646555 has 48 divisors (see below), whose sum is σ = 1139988517824. Its totient is φ = 348591962880.

The previous prime is 655646646547. The next prime is 655646646601. The reversal of 655646646555 is 555646646556.

655646646555 is a `hidden beast` number, since 6 + 5 + 5 + 64 + 66 + 465 + 55 = 666.

655646646555 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 655646646555 - 2³ = 655646646547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655646646492 and 655646646501.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27401457 + ... + 27425373.

It is an arithmetic number, because the mean of its divisors is an integer number (23749760788).

Almost surely, 2^655646646555 is an apocalyptic number.

655646646555 is a deficient number, since it is larger than the sum of its proper divisors (484341871269).

655646646555 is a wasteful number, since it uses less digits than its factorization.

655646646555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25796 (or 25793 counting only the distinct ones).

The product of its digits is 388800000, while the sum is 63.

Subtracting from 655646646555 its reverse (555646646556), we obtain a palindrome (99999999999).

The spelling of 655646646555 in words is "six hundred fifty-five billion, six hundred forty-six million, six hundred forty-six thousand, five hundred fifty-five".