985255784600 has 96 divisors (see below), whose sum is σ = 2370509215200. Its totient is φ = 380384256000.

The previous prime is 985255784593. The next prime is 985255784663. The reversal of 985255784600 is 6487552589.

It is a super-2 number, since 2×985255784600² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 985255784600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18167525 + ... + 18221675.

It is an arithmetic number, because the mean of its divisors is an integer number (24692804325).

Almost surely, 2^985255784600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985255784600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185254607600).

985255784600 is an abundant number, since it is smaller than the sum of its proper divisors (1385253430600).

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

985255784600 is a wasteful number, since it uses less digits than its factorization.

985255784600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57333 (or 57324 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 985255784600 in words is "nine hundred eighty-five billion, two hundred fifty-five million, seven hundred eighty-four thousand, six hundred".