2655685551 has 4 divisors (see below), whose sum is σ = 3540914072. Its totient is φ = 1770457032.

The previous prime is 2655685541. The next prime is 2655685577. The reversal of 2655685551 is 1555865562.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2655685551 - 2²⁶ = 2588576687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2655685551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655685541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442614256 + ... + 442614261.

It is an arithmetic number, because the mean of its divisors is an integer number (885228518).

Almost surely, 2^2655685551 is an apocalyptic number.

2655685551 is a deficient number, since it is larger than the sum of its proper divisors (885228521).

2655685551 is an equidigital number, since it uses as much as digits as its factorization.

2655685551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885228520.

The product of its digits is 1800000, while the sum is 48.

The square root of 2655685551 is about 51533.3440696410. The cubic root of 2655685551 is about 1384.8164598412.

The spelling of 2655685551 in words is "two billion, six hundred fifty-five million, six hundred eighty-five thousand, five hundred fifty-one".