89981123280 has 160 divisors (see below), whose sum is σ = 292238819328. Its totient is φ = 22874227200.

The previous prime is 89981123269. The next prime is 89981123293. The reversal of 89981123280 is 8232118998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408225 + ... + 588735.

Almost surely, 2^89981123280 is an apocalyptic number.

89981123280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89981123280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146119409664).

89981123280 is an abundant number, since it is smaller than the sum of its proper divisors (202257696048).

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

89981123280 is a wasteful number, since it uses less digits than its factorization.

89981123280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180625 (or 180619 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The spelling of 89981123280 in words is "eighty-nine billion, nine hundred eighty-one million, one hundred twenty-three thousand, two hundred eighty".