2155664559 has 8 divisors (see below), whose sum is σ = 2875299840. Its totient is φ = 1436569496.

The previous prime is 2155664521. The next prime is 2155664591. The reversal of 2155664559 is 9554665512.

2155664559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2155664559 - 2²⁷ = 2021446831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155664059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125649 + ... + 141770.

It is an arithmetic number, because the mean of its divisors is an integer number (359412480).

Almost surely, 2^2155664559 is an apocalyptic number.

2155664559 is a deficient number, since it is larger than the sum of its proper divisors (719635281).

2155664559 is a wasteful number, since it uses less digits than its factorization.

2155664559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270109.

The product of its digits is 1620000, while the sum is 48.

The square root of 2155664559 is about 46429.1348077907. The cubic root of 2155664559 is about 1291.7953806236.

The spelling of 2155664559 in words is "two billion, one hundred fifty-five million, six hundred sixty-four thousand, five hundred fifty-nine".