2565653516 has 6 divisors (see below), whose sum is σ = 4489893660. Its totient is φ = 1282826756.

The previous prime is 2565653507. The next prime is 2565653537. The reversal of 2565653516 is 6153565652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320706686 + ... + 320706693.

It is an arithmetic number, because the mean of its divisors is an integer number (748315610).

Almost surely, 2^2565653516 is an apocalyptic number.

It is an amenable number.

2565653516 is a deficient number, since it is larger than the sum of its proper divisors (1924240144).

2565653516 is a wasteful number, since it uses less digits than its factorization.

2565653516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641413383 (or 641413381 counting only the distinct ones).

The product of its digits is 810000, while the sum is 44.

The square root of 2565653516 is about 50652.2804619891. The cubic root of 2565653516 is about 1368.9870353205.

The spelling of 2565653516 in words is "two billion, five hundred sixty-five million, six hundred fifty-three thousand, five hundred sixteen".