90798217792 has 56 divisors (see below), whose sum is σ = 189810278240. Its totient is φ = 42975774720.

The previous prime is 90798217751. The next prime is 90798217793. The reversal of 90798217792 is 29771289709.

It is a self number, because there is not a number n which added to its sum of digits gives 90798217792.

It is not an unprimeable number, because it can be changed into a prime (90798217793) 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 7 ways as a sum of consecutive naturals, for example, 1548367 + ... + 1605937.

Almost surely, 2^90798217792 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 90798217792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94905139120).

90798217792 is an abundant number, since it is smaller than the sum of its proper divisors (99012060448).

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

90798217792 is a wasteful number, since it uses less digits than its factorization.

90798217792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58899 (or 58889 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 61.

The spelling of 90798217792 in words is "ninety billion, seven hundred ninety-eight million, two hundred seventeen thousand, seven hundred ninety-two".