998595595899 has 48 divisors (see below), whose sum is σ = 1630520686080. Its totient is φ = 583651897920.

The previous prime is 998595595853. The next prime is 998595595901.

998595595899 is a `hidden beast` number, since 9 + 9 + 8 + 5 + 9 + 5 + 595 + 8 + 9 + 9 = 666.

998595595899 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 998595595899 - 2⁸ = 998595595643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998595595999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1148364 + ... + 1820969.

It is an arithmetic number, because the mean of its divisors is an integer number (33969180960).

Almost surely, 2^998595595899 is an apocalyptic number.

998595595899 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

998595595899 is a deficient number, since it is larger than the sum of its proper divisors (631925090181).

998595595899 is a wasteful number, since it uses less digits than its factorization.

998595595899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969472 (or 2969469 counting only the distinct ones).

The product of its digits is 21257640000, while the sum is 90.

The spelling of 998595595899 in words is "nine hundred ninety-eight billion, five hundred ninety-five million, five hundred ninety-five thousand, eight hundred ninety-nine".