98987877878989 has 32 divisors (see below), whose sum is σ = 108538195968000. Its totient is φ = 89530203987840.

The previous prime is 98987877878987. The next prime is 98987877879001.

It is a happy number.

98987877878989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 98987877878989 - 2¹ = 98987877878987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98987877878987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21292292337 + ... + 21292296985.

It is an arithmetic number, because the mean of its divisors is an integer number (3391818624000).

Almost surely, 2^{98987877878989} is an apocalyptic number.

It is an amenable number.

98987877878989 is a deficient number, since it is larger than the sum of its proper divisors (9550318089011).

98987877878989 is a wasteful number, since it uses less digits than its factorization.

98987877878989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593.

The product of its digits is 4129544208384, while the sum is 112.

The spelling of 98987877878989 in words is "ninety-eight trillion, nine hundred eighty-seven billion, eight hundred seventy-seven million, eight hundred seventy-eight thousand, nine hundred eighty-nine".