250515012440 has 256 divisors, whose sum is σ = 717432422400. Its totient is φ = 76460889600.

The previous prime is 250515012439. The next prime is 250515012491. The reversal of 250515012440 is 44210515052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49243577 + ... + 49248663.

It is an arithmetic number, because the mean of its divisors is an integer number (2802470400).

Almost surely, 2^250515012440 is an apocalyptic number.

250515012440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250515012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358716211200).

250515012440 is an abundant number, since it is smaller than the sum of its proper divisors (466917409960).

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

250515012440 is a wasteful number, since it uses less digits than its factorization.

250515012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5446 (or 5442 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 250515012440 its reverse (44210515052), we get a palindrome (294725527492).

The spelling of 250515012440 in words is "two hundred fifty billion, five hundred fifteen million, twelve thousand, four hundred forty".