90493859442 has 64 divisors (see below), whose sum is σ = 213240787200. Its totient is φ = 25588781568.

The previous prime is 90493859441. The next prime is 90493859531. The reversal of 90493859442 is 24495839409.

It is not an unprimeable number, because it can be changed into a prime (90493859441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 27033 + ... + 426284.

It is an arithmetic number, because the mean of its divisors is an integer number (3331887300).

Almost surely, 2^90493859442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90493859442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106620393600).

90493859442 is an abundant number, since it is smaller than the sum of its proper divisors (122746927758).

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

90493859442 is a wasteful number, since it uses less digits than its factorization.

90493859442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453440 (or 453426 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 90493859442 in words is "ninety billion, four hundred ninety-three million, eight hundred fifty-nine thousand, four hundred forty-two".