250265002640 has 20 divisors (see below), whose sum is σ = 581866131324. Its totient is φ = 100106001024.

The previous prime is 250265002639. The next prime is 250265002661. The reversal of 250265002640 is 46200562052.

It can be written as a sum of positive squares in 2 ways, for example, as 138345314704 + 111919687936 = 371948^2 + 334544^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 250265002597 and 250265002606.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1564156187 + ... + 1564156346.

Almost surely, 2^250265002640 is an apocalyptic number.

250265002640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250265002640 is an abundant number, since it is smaller than the sum of its proper divisors (331601128684).

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

250265002640 is a wasteful number, since it uses less digits than its factorization.

250265002640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128312546 (or 3128312540 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 250265002640 its reverse (46200562052), we get a palindrome (296465564692).

The spelling of 250265002640 in words is "two hundred fifty billion, two hundred sixty-five million, two thousand, six hundred forty".