2556605923 has 4 divisors (see below), whose sum is σ = 2587408488. Its totient is φ = 2525803360.

The previous prime is 2556605837. The next prime is 2556605939. The reversal of 2556605923 is 3295066552.

2556605923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2556605923 - 2¹³ = 2556597731 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 2556605923.

It is not an unprimeable number, because it can be changed into a prime (2556605423) 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, 15401158 + ... + 15401323.

It is an arithmetic number, because the mean of its divisors is an integer number (646852122).

Almost surely, 2^2556605923 is an apocalyptic number.

2556605923 is a deficient number, since it is larger than the sum of its proper divisors (30802565).

2556605923 is an equidigital number, since it uses as much as digits as its factorization.

2556605923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30802564.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 2556605923 is about 50562.8907698126. The cubic root of 2556605923 is about 1367.3759285047.

The spelling of 2556605923 in words is "two billion, five hundred fifty-six million, six hundred five thousand, nine hundred twenty-three".