98975518821 has 24 divisors (see below), whose sum is σ = 149194184256. Its totient is φ = 63109031040.

The previous prime is 98975518813. The next prime is 98975518871. The reversal of 98975518821 is 12881557989.

98975518821 is a `hidden beast` number, since 9 + 8 + 97 + 5 + 518 + 8 + 21 = 666.

It is not a de Polignac number, because 98975518821 - 2³ = 98975518813 is a prime.

It is a super-2 number, since 2×98975518821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98975518871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4153581 + ... + 4177341.

It is an arithmetic number, because the mean of its divisors is an integer number (6216424344).

Almost surely, 2^98975518821 is an apocalyptic number.

It is an amenable number.

98975518821 is a deficient number, since it is larger than the sum of its proper divisors (50218665435).

98975518821 is a wasteful number, since it uses less digits than its factorization.

98975518821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43913 (or 43910 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 63.

It can be divided in two parts, 98975 and 518821, that added together give a square (617796 = 786²).

The spelling of 98975518821 in words is "ninety-eight billion, nine hundred seventy-five million, five hundred eighteen thousand, eight hundred twenty-one".