98755118628721 has 3 divisors (see below), whose sum is σ = 98755128566283. Its totient is φ = 98755108691160.

The previous prime is 98755118628709. The next prime is 98755118628767. The reversal of 98755118628721 is 12782681155789.

The square root of 98755118628721 is 9937561.

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., 5082143518321 + 93672975110400 = 2254361^2 + 9678480^2 .

It is not a de Polignac number, because 98755118628721 - 2⁹ = 98755118628209 is a prime.

It is a super-4 number, since 4×98755118628721⁴ (a number of 57 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98755118628421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4968781 + ... + 14906341.

It is an arithmetic number, because the mean of its divisors is an integer number (32918376188761).

Almost surely, 2^{98755118628721} is an apocalyptic number.

98755118628721 is the 9937561-st square number.

98755118628721 is the 4968781-st centered octagonal number.

It is an amenable number.

98755118628721 is a deficient number, since it is larger than the sum of its proper divisors (9937562).

98755118628721 is an frugal number, since it uses more digits than its factorization.

98755118628721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19875122 (or 9937561 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 70.

The spelling of 98755118628721 in words is "ninety-eight trillion, seven hundred fifty-five billion, one hundred eighteen million, six hundred twenty-eight thousand, seven hundred twenty-one".