2555669845 has 4 divisors (see below), whose sum is σ = 3066803820. Its totient is φ = 2044535872.

The previous prime is 2555669839. The next prime is 2555669861. The reversal of 2555669845 is 5489665552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 325658116 + 2230011729 = 18046^2 + 47223^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555669845 - 2⁵ = 2555669813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255566980 + ... + 255566989.

It is an arithmetic number, because the mean of its divisors is an integer number (766700955).

Almost surely, 2^2555669845 is an apocalyptic number.

It is an amenable number.

2555669845 is a deficient number, since it is larger than the sum of its proper divisors (511133975).

2555669845 is an equidigital number, since it uses as much as digits as its factorization.

2555669845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511133974.

The product of its digits is 12960000, while the sum is 55.

The square root of 2555669845 is about 50553.6333511252. The cubic root of 2555669845 is about 1367.2090240473.

It can be divided in two parts, 2555 and 669845, that added together give a square (672400 = 820²).

The spelling of 2555669845 in words is "two billion, five hundred fifty-five million, six hundred sixty-nine thousand, eight hundred forty-five".