2605285764 has 81 divisors (see below), whose sum is σ = 6766063941. Its totient is φ = 845255520.

The previous prime is 2605285733. The next prime is 2605285777. The reversal of 2605285764 is 4675825062.

The square root of 2605285764 is 51042.

It is a perfect power (a square), and thus also a powerful number.

2605285764 is a `hidden beast` number, since 2 + 60 + 528 + 5 + 7 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28708164 + 2576577600 = 5358^2 + 50760^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14393754 + ... + 14393934.

Almost surely, 2^2605285764 is an apocalyptic number.

2605285764 is the 51042-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2605285764

2605285764 is an abundant number, since it is smaller than the sum of its proper divisors (4160778177).

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

2605285764 is a wasteful number, since it uses less digits than its factorization.

2605285764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The cubic root of 2605285764 is about 1376.0000683083. Note that the first 4 decimals are identical.

It can be divided in two parts, 2605 and 285764, that added together give a square (288369 = 537²).

The spelling of 2605285764 in words is "two billion, six hundred five million, two hundred eighty-five thousand, seven hundred sixty-four".