9985155832 has 8 divisors (see below), whose sum is σ = 18722167200. Its totient is φ = 4992577912.

The previous prime is 9985155821. The next prime is 9985155833. The reversal of 9985155832 is 2385515899.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×9985155832² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9985155833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624072232 + ... + 624072247.

It is an arithmetic number, because the mean of its divisors is an integer number (2340270900).

Almost surely, 2^9985155832 is an apocalyptic number.

It is an amenable number.

9985155832 is a deficient number, since it is larger than the sum of its proper divisors (8737011368).

9985155832 is a wasteful number, since it uses less digits than its factorization.

9985155832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248144485 (or 1248144481 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 55.

The square root of 9985155832 is about 99925.7515958724. The cubic root of 9985155832 is about 2153.3681357712.

The spelling of 9985155832 in words is "nine billion, nine hundred eighty-five million, one hundred fifty-five thousand, eight hundred thirty-two".