2565026320 has 20 divisors (see below), whose sum is σ = 5963686380. Its totient is φ = 1026010496.

The previous prime is 2565026291. The next prime is 2565026327. The reversal of 2565026320 is 236205652.

It can be written as a sum of positive squares in 2 ways, for example, as 624800016 + 1940226304 = 24996^2 + 44048^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2565026327) 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, 16031335 + ... + 16031494.

It is an arithmetic number, because the mean of its divisors is an integer number (298184319).

Almost surely, 2^2565026320 is an apocalyptic number.

2565026320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565026320 is an abundant number, since it is smaller than the sum of its proper divisors (3398660060).

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

2565026320 is a wasteful number, since it uses less digits than its factorization.

2565026320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32062842 (or 32062836 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2565026320 is about 50646.0888914435. The cubic root of 2565026320 is about 1368.8754726896.

The spelling of 2565026320 in words is "two billion, five hundred sixty-five million, twenty-six thousand, three hundred twenty".