90898163520 has 224 divisors, whose sum is σ = 292921090560. Its totient is φ = 23878778880.

The previous prime is 90898163519. The next prime is 90898163591. The reversal of 90898163520 is 2536189809.

It is a happy number.

It is a super-2 number, since 2×90898163520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 25032105 + ... + 25035735.

It is an arithmetic number, because the mean of its divisors is an integer number (1307683440).

Almost surely, 2^90898163520 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 90898163520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146460545280).

90898163520 is an abundant number, since it is smaller than the sum of its proper divisors (202022927040).

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

90898163520 is a wasteful number, since it uses less digits than its factorization.

90898163520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 90898163520 in words is "ninety billion, eight hundred ninety-eight million, one hundred sixty-three thousand, five hundred twenty".