2565636450 has 48 divisors (see below), whose sum is σ = 6852228096. Its totient is φ = 631540800.

The previous prime is 2565636439. The next prime is 2565636461. The reversal of 2565636450 is 546365652.

It is an interprime number because it is at equal distance from previous prime (2565636439) and next prime (2565636461).

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 in 23 ways as a sum of consecutive naturals, for example, 655906 + ... + 659805.

It is an arithmetic number, because the mean of its divisors is an integer number (142754752).

Almost surely, 2^2565636450 is an apocalyptic number.

2565636450 is an abundant number, since it is smaller than the sum of its proper divisors (4286591646).

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

2565636450 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 2565636450 = (6553624506)₉.

2565636450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315739 (or 1315734 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The square root of 2565636450 is about 50652.1119994024. Note that the first 3 decimals coincide. The cubic root of 2565636450 is about 1368.9839999425.

It can be divided in two parts, 2565 and 636450, that added together give a triangular number (639015 = T₁₁₃₀).

The spelling of 2565636450 in words is "two billion, five hundred sixty-five million, six hundred thirty-six thousand, four hundred fifty".