98398908891 has 16 divisors (see below), whose sum is σ = 145878661120. Its totient is φ = 65553147720.

The previous prime is 98398908857. The next prime is 98398908899. The reversal of 98398908891 is 19880989389.

It is not a de Polignac number, because 98398908891 - 2⁶ = 98398908827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98398908899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242115 + ... + 1318956.

It is an arithmetic number, because the mean of its divisors is an integer number (9117416320).

Almost surely, 2^98398908891 is an apocalyptic number.

98398908891 is a deficient number, since it is larger than the sum of its proper divisors (47479752229).

98398908891 is a wasteful number, since it uses less digits than its factorization.

98398908891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562503 (or 2562497 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 72.

The spelling of 98398908891 in words is "ninety-eight billion, three hundred ninety-eight million, nine hundred eight thousand, eight hundred ninety-one".