655642252235661 has 16 divisors (see below), whose sum is σ = 887329345032960. Its totient is φ = 430540733272320.

The previous prime is 655642252235647. The next prime is 655642252235753. The reversal of 655642252235661 is 166532252246556.

655642252235661 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 655642252235661 - 2⁹ = 655642252235149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655642252235595 and 655642252235604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655642252236661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966850581 + ... + 1967183898.

It is an arithmetic number, because the mean of its divisors is an integer number (55458084064560).

Almost surely, 2^{655642252235661} is an apocalyptic number.

It is an amenable number.

655642252235661 is a deficient number, since it is larger than the sum of its proper divisors (231687092797299).

655642252235661 is a wasteful number, since it uses less digits than its factorization.

655642252235661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934035316.

The product of its digits is 155520000, while the sum is 60.

The spelling of 655642252235661 in words is "six hundred fifty-five trillion, six hundred forty-two billion, two hundred fifty-two million, two hundred thirty-five thousand, six hundred sixty-one".