2585505500 has 24 divisors (see below), whose sum is σ = 5646745104. Its totient is φ = 1034202000.

The previous prime is 2585505487. The next prime is 2585505553. The reversal of 2585505500 is 55055852.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585006 + ... + 2586005.

It is an arithmetic number, because the mean of its divisors is an integer number (235281046).

Almost surely, 2^2585505500 is an apocalyptic number.

2585505500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2585505500 is an abundant number, since it is smaller than the sum of its proper divisors (3061239604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2585505500 is a wasteful number, since it uses less digits than its factorization.

2585505500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171030 (or 5171018 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The square root of 2585505500 is about 50847.8662285843. The cubic root of 2585505500 is about 1372.5088558082.

The spelling of 2585505500 in words is "two billion, five hundred eighty-five million, five hundred five thousand, five hundred".