2565504250 has 32 divisors (see below), whose sum is σ = 4805658000. Its totient is φ = 1025553600.

The previous prime is 2565504233. The next prime is 2565504251. The reversal of 2565504250 is 524055652.

It can be written as a sum of positive squares in 8 ways, for example, as 385641 + 2565118609 = 621^2 + 50647^2 .

It is not an unprimeable number, because it can be changed into a prime (2565504251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685384 + ... + 689116.

Almost surely, 2^2565504250 is an apocalyptic number.

2565504250 is a deficient number, since it is larger than the sum of its proper divisors (2240153750).

2565504250 is a wasteful number, since it uses less digits than its factorization.

2565504250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499 (or 6489 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 2565504250 is about 50650.8070024555. The cubic root of 2565504250 is about 1368.9604862456.

The spelling of 2565504250 in words is "two billion, five hundred sixty-five million, five hundred four thousand, two hundred fifty".