90318821256 has 192 divisors, whose sum is σ = 270340761600. Its totient is φ = 28183940928.

The previous prime is 90318821237. The next prime is 90318821269. The reversal of 90318821256 is 65212881309.

90318821256 is a `hidden beast` number, since 9 + 0 + 318 + 82 + 1 + 256 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2079975 + ... + 2122953.

It is an arithmetic number, because the mean of its divisors is an integer number (1408024800).

Almost surely, 2^90318821256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90318821256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135170380800).

90318821256 is an abundant number, since it is smaller than the sum of its proper divisors (180021940344).

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

90318821256 is a wasteful number, since it uses less digits than its factorization.

90318821256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43070 (or 43054 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 90318821256 in words is "ninety billion, three hundred eighteen million, eight hundred twenty-one thousand, two hundred fifty-six".