2555903865 has 32 divisors (see below), whose sum is σ = 4278226176. Its totient is φ = 1300527360.

The previous prime is 2555903863. The next prime is 2555903887. The reversal of 2555903865 is 5683095552.

It is not a de Polignac number, because 2555903865 - 2¹ = 2555903863 is a prime.

It is a super-3 number, since 3×2555903865³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2555903863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127635 + ... + 146295.

It is an arithmetic number, because the mean of its divisors is an integer number (133694568).

Almost surely, 2^2555903865 is an apocalyptic number.

It is an amenable number.

2555903865 is a deficient number, since it is larger than the sum of its proper divisors (1722322311).

2555903865 is a wasteful number, since it uses less digits than its factorization.

2555903865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19089.

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

The square root of 2555903865 is about 50555.9478696622. The cubic root of 2555903865 is about 1367.2507540711.

The spelling of 2555903865 in words is "two billion, five hundred fifty-five million, nine hundred three thousand, eight hundred sixty-five".