988550959081 has 45 divisors (see below), whose sum is σ = 1170487456791. Its totient is φ = 834843488976.

The previous prime is 988550959073. The next prime is 988550959087. The reversal of 988550959081 is 180959055889.

The square root of 988550959081 is 994259.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 968580747225 + 19970211856 = 984165^2 + 141316^2 .

It is not a de Polignac number, because 988550959081 - 2³ = 988550959073 is a prime.

It is a super-2 number, since 2×988550959081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 988550958998 and 988550959016.

It is not an unprimeable number, because it can be changed into a prime (988550959087) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5018025075 + ... + 5018025271.

Almost surely, 2^988550959081 is an apocalyptic number.

988550959081 is the 994259-th square number.

988550959081 is the 497130-th centered octagonal number.

It is an amenable number.

988550959081 is a deficient number, since it is larger than the sum of its proper divisors (181936497710).

988550959081 is an frugal number, since it uses more digits than its factorization.

988550959081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 67.

The spelling of 988550959081 in words is "nine hundred eighty-eight billion, five hundred fifty million, nine hundred fifty-nine thousand, eighty-one".