250485689840 has 80 divisors (see below), whose sum is σ = 613484305920. Its totient is φ = 94850668800.

The previous prime is 250485689837. The next prime is 250485689851. The reversal of 250485689840 is 48986584052.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 250485689840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2017565 + ... + 2138115.

It is an arithmetic number, because the mean of its divisors is an integer number (7668553824).

Almost surely, 2^250485689840 is an apocalyptic number.

250485689840 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 250485689840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306742152960).

250485689840 is an abundant number, since it is smaller than the sum of its proper divisors (362998616080).

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

250485689840 is a wasteful number, since it uses less digits than its factorization.

250485689840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121950 (or 121944 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 59.

The spelling of 250485689840 in words is "two hundred fifty billion, four hundred eighty-five million, six hundred eighty-nine thousand, eight hundred forty".