2655642565 has 8 divisors (see below), whose sum is σ = 3196229400. Its totient is φ = 2118208512.

The previous prime is 2655642449. The next prime is 2655642601. The reversal of 2655642565 is 5652465562.

It can be written as a sum of positive squares in 4 ways, for example, as 771561729 + 1884080836 = 27777^2 + 43406^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2655642565 - 2⁹ = 2655642053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786340 + ... + 789709.

It is an arithmetic number, because the mean of its divisors is an integer number (399528675).

Almost surely, 2^2655642565 is an apocalyptic number.

It is an amenable number.

2655642565 is a deficient number, since it is larger than the sum of its proper divisors (540586835).

2655642565 is a wasteful number, since it uses less digits than its factorization.

2655642565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576391.

The product of its digits is 2160000, while the sum is 46.

The square root of 2655642565 is about 51532.9269981824. The cubic root of 2655642565 is about 1384.8089880679.

The spelling of 2655642565 in words is "two billion, six hundred fifty-five million, six hundred forty-two thousand, five hundred sixty-five".