985099406538 has 128 divisors (see below), whose sum is σ = 2265964968960. Its totient is φ = 282818165760.

The previous prime is 985099406503. The next prime is 985099406569. The reversal of 985099406538 is 835604990589.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 227031573 + ... + 227035911.

It is an arithmetic number, because the mean of its divisors is an integer number (17702851320).

Almost surely, 2^985099406538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985099406538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132982484480).

985099406538 is an abundant number, since it is smaller than the sum of its proper divisors (1280865562422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

985099406538 is a wasteful number, since it uses less digits than its factorization.

985099406538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812.

The product of its (nonzero) digits is 83980800, while the sum is 66.

The spelling of 985099406538 in words is "nine hundred eighty-five billion, ninety-nine million, four hundred six thousand, five hundred thirty-eight".