2605380860 has 12 divisors (see below), whose sum is σ = 5471299848. Its totient is φ = 1042152336.

The previous prime is 2605380859. The next prime is 2605380889. The reversal of 2605380860 is 680835062.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65134502 + ... + 65134541.

It is an arithmetic number, because the mean of its divisors is an integer number (455941654).

Almost surely, 2^2605380860 is an apocalyptic number.

2605380860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2605380860 is an abundant number, since it is smaller than the sum of its proper divisors (2865918988).

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

2605380860 is a wasteful number, since it uses less digits than its factorization.

2605380860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130269052 (or 130269050 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2605380860 is about 51042.9315380690. The cubic root of 2605380860 is about 1376.0168099792.

The spelling of 2605380860 in words is "two billion, six hundred five million, three hundred eighty thousand, eight hundred sixty".