2565191250650 has 36 divisors (see below), whose sum is σ = 5550236258238. Its totient is φ = 879494142240.

The previous prime is 2565191250649. The next prime is 2565191250653. The reversal of 2565191250650 is 560521915652.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 954523138009 + 1610668112641 = 976997^2 + 1269121^2 .

It is a super-2 number, since 2×2565191250650² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2565191250595 and 2565191250604.

It is not an unprimeable number, because it can be changed into a prime (2565191250653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 523505969 + ... + 523510868.

Almost surely, 2^{2565191250650} is an apocalyptic number.

2565191250650 is an abundant number, since it is smaller than the sum of its proper divisors (2985045007588).

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

2565191250650 is a wasteful number, since it uses less digits than its factorization.

2565191250650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047016863 (or 1047016851 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 2565191250650 in words is "two trillion, five hundred sixty-five billion, one hundred ninety-one million, two hundred fifty thousand, six hundred fifty".