90221941782 has 144 divisors (see below), whose sum is σ = 244368699120. Its totient is φ = 23898986496.

The previous prime is 90221941729. The next prime is 90221941861. The reversal of 90221941782 is 28714912209.

90221941782 is a `hidden beast` number, since 9 + 0 + 221 + 9 + 417 + 8 + 2 = 666.

It is a congruent number.

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, 959694 + ... + 1049502.

It is an arithmetic number, because the mean of its divisors is an integer number (1697004855).

Almost surely, 2^90221941782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90221941782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122184349560).

90221941782 is an abundant number, since it is smaller than the sum of its proper divisors (154146757338).

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

90221941782 is a wasteful number, since it uses less digits than its factorization.

90221941782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89915 (or 89905 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 90221941782 in words is "ninety billion, two hundred twenty-one million, nine hundred forty-one thousand, seven hundred eighty-two".