98111818229881 has 3 divisors (see below), whose sum is σ = 98111828135023. Its totient is φ = 98111808324740.

The previous prime is 98111818229863. The next prime is 98111818229959. The reversal of 98111818229881 is 18892281811189.

The square root of 98111818229881 is 9905141.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 93870113218281 + 4241705011600 = 9688659^2 + 2059540^2 .

It is a de Polignac number, because none of the positive numbers 2^k-98111818229881 is a prime.

It is a super-2 number, since 2×98111818229881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98111818229801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4952571 + ... + 14857711.

Almost surely, 2^{98111818229881} is an apocalyptic number.

98111818229881 is the 9905141-st square number.

98111818229881 is the 4952571-st centered octagonal number.

It is an amenable number.

98111818229881 is a deficient number, since it is larger than the sum of its proper divisors (9905142).

98111818229881 is an frugal number, since it uses more digits than its factorization.

98111818229881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19810282 (or 9905141 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 67.

The spelling of 98111818229881 in words is "ninety-eight trillion, one hundred eleven billion, eight hundred eighteen million, two hundred twenty-nine thousand, eight hundred eighty-one".