90818534448 has 160 divisors (see below), whose sum is σ = 266118681600. Its totient is φ = 29647296000.

The previous prime is 90818534441. The next prime is 90818534453. The reversal of 90818534448 is 84443581809.

It is a happy number.

90818534448 is a `hidden beast` number, since 90 + 8 + 1 + 85 + 34 + 448 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 90818534394 and 90818534403.

It is not an unprimeable number, because it can be changed into a prime (90818534441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4621668 + ... + 4641276.

It is an arithmetic number, because the mean of its divisors is an integer number (1663241760).

Almost surely, 2^90818534448 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 90818534448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133059340800).

90818534448 is an abundant number, since it is smaller than the sum of its proper divisors (175300147152).

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

90818534448 is a wasteful number, since it uses less digits than its factorization.

90818534448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848 (or 19836 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 90818534448 in words is "ninety billion, eight hundred eighteen million, five hundred thirty-four thousand, four hundred forty-eight".