2565311630 has 32 divisors (see below), whose sum is σ = 5399944704. Its totient is φ = 859080096.

The previous prime is 2565311591. The next prime is 2565311687. The reversal of 2565311630 is 361135652.

2565311630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423122 + ... + 429141.

It is an arithmetic number, because the mean of its divisors is an integer number (168748272).

Almost surely, 2^2565311630 is an apocalyptic number.

2565311630 is an abundant number, since it is smaller than the sum of its proper divisors (2834633074).

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

2565311630 is a wasteful number, since it uses less digits than its factorization.

2565311630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852320.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 2565311630 is about 50648.9055163090. The cubic root of 2565311630 is about 1368.9262245251.

The spelling of 2565311630 in words is "two billion, five hundred sixty-five million, three hundred eleven thousand, six hundred thirty".