2605557880 has 16 divisors (see below), whose sum is σ = 5862505320. Its totient is φ = 1042223136.

The previous prime is 2605557869. The next prime is 2605557883. The reversal of 2605557880 is 887555062.

2605557880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2605557880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605557883) 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, 32569434 + ... + 32569513.

Almost surely, 2^2605557880 is an apocalyptic number.

2605557880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2605557880 is an abundant number, since it is smaller than the sum of its proper divisors (3256947440).

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

2605557880 is a wasteful number, since it uses less digits than its factorization.

2605557880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65138958 (or 65138954 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 2605557880 is about 51044.6655391139. The cubic root of 2605557880 is about 1376.0479733026.

The spelling of 2605557880 in words is "two billion, six hundred five million, five hundred fifty-seven thousand, eight hundred eighty".