2655611621 has 8 divisors (see below), whose sum is σ = 2952144384. Its totient is φ = 2372258160.

The previous prime is 2655611603. The next prime is 2655611639. The reversal of 2655611621 is 1261165562.

It is an interprime number because it is at equal distance from previous prime (2655611603) and next prime (2655611639).

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 2655611621 - 2⁶ = 2655611557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655611221) 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, 3294401 + ... + 3295206.

It is an arithmetic number, because the mean of its divisors is an integer number (369018048).

Almost surely, 2^2655611621 is an apocalyptic number.

It is an amenable number.

2655611621 is a deficient number, since it is larger than the sum of its proper divisors (296532763).

2655611621 is a wasteful number, since it uses less digits than its factorization.

2655611621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6589651.

The product of its digits is 21600, while the sum is 35.

The square root of 2655611621 is about 51532.6267620815. The cubic root of 2655611621 is about 1384.8036093702.

The spelling of 2655611621 in words is "two billion, six hundred fifty-five million, six hundred eleven thousand, six hundred twenty-one".