2605787456 has 42 divisors (see below), whose sum is σ = 5314568238. Its totient is φ = 1267637760.

The previous prime is 2605787413. The next prime is 2605787467. The reversal of 2605787456 is 6547875062.

It can be written as a sum of positive squares in 3 ways, for example, as 2008473856 + 597313600 = 44816^2 + 24440^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72746 + ... + 102486.

It is an arithmetic number, because the mean of its divisors is an integer number (126537339).

Almost surely, 2^2605787456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2605787456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2657284119).

2605787456 is an abundant number, since it is smaller than the sum of its proper divisors (2708780782).

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

2605787456 is an equidigital number, since it uses as much as digits as its factorization.

2605787456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29827 (or 29780 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 50.

The square root of 2605787456 is about 51046.9142652129. The cubic root of 2605787456 is about 1376.0883866967.

The spelling of 2605787456 in words is "two billion, six hundred five million, seven hundred eighty-seven thousand, four hundred fifty-six".