250256426490 has 144 divisors (see below), whose sum is σ = 759011160960. Its totient is φ = 57041772480.

The previous prime is 250256426489. The next prime is 250256426503. The reversal of 250256426490 is 94624652052.

250256426490 is a `hidden beast` number, since 2 + 50 + 256 + 4 + 264 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1504155 + ... + 1662225.

It is an arithmetic number, because the mean of its divisors is an integer number (5270910840).

Almost surely, 2^250256426490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250256426490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379505580480).

250256426490 is an abundant number, since it is smaller than the sum of its proper divisors (508754734470).

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

250256426490 is a wasteful number, since it uses less digits than its factorization.

250256426490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158457 (or 158447 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 250256426490 in words is "two hundred fifty billion, two hundred fifty-six million, four hundred twenty-six thousand, four hundred ninety".