2655690689 has 8 divisors (see below), whose sum is σ = 2748533160. Its totient is φ = 2562932736.

The previous prime is 2655690677. The next prime is 2655690727. The reversal of 2655690689 is 9860965562.

It can be written as a sum of positive squares in 4 ways, for example, as 594530689 + 2061160000 = 24383^2 + 45400^2 .

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 2655690689 - 2¹⁶ = 2655625153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2655690619) by changing a digit.

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, 46529 + ... + 86465.

It is an arithmetic number, because the mean of its divisors is an integer number (343566645).

Almost surely, 2^2655690689 is an apocalyptic number.

2655690689 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2655690689 is a deficient number, since it is larger than the sum of its proper divisors (92842471).

2655690689 is a wasteful number, since it uses less digits than its factorization.

2655690689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42259.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The square root of 2655690689 is about 51533.3939208354. The cubic root of 2655690689 is about 1384.8173529166.

The spelling of 2655690689 in words is "two billion, six hundred fifty-five million, six hundred ninety thousand, six hundred eighty-nine".