98981785183681 has 9 divisors (see below), whose sum is σ = 99135785248419. Its totient is φ = 98828024022336.

The previous prime is 98981785183663. The next prime is 98981785183709. The reversal of 98981785183681 is 18638158718989.

The square root of 98981785183681 is 9948959.

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., 32392660017025 + 66589125166656 = 5691455^2 + 8160216^2 .

It is not a de Polignac number, because 98981785183681 - 2⁵ = 98981785183649 is a prime.

It is a super-2 number, since 2×98981785183681² (a number of 29 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 = 98981785183595 and 98981785183604.

It is not an unprimeable number, because it can be changed into a prime (98981785183621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6695642016 + ... + 6695656798.

Almost surely, 2^{98981785183681} is an apocalyptic number.

98981785183681 is the 9948959-th square number.

98981785183681 is the 4974480-th centered octagonal number.

It is an amenable number.

98981785183681 is a deficient number, since it is larger than the sum of its proper divisors (154000064738).

98981785183681 is an frugal number, since it uses more digits than its factorization.

98981785183681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30912 (or 15456 counting only the distinct ones).

The product of its digits is 1672151040, while the sum is 82.

The spelling of 98981785183681 in words is "ninety-eight trillion, nine hundred eighty-one billion, seven hundred eighty-five million, one hundred eighty-three thousand, six hundred eighty-one".