9855971692 has 48 divisors (see below), whose sum is σ = 20294509312. Its totient is φ = 4100362560.

The previous prime is 9855971687. The next prime is 9855971693. The reversal of 9855971692 is 2961795589.

9855971692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×9855971692³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9855971692.

It is not an unprimeable number, because it can be changed into a prime (9855971693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171142 + ... + 221362.

Almost surely, 2^9855971692 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 9855971692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10147254656).

9855971692 is an abundant number, since it is smaller than the sum of its proper divisors (10438537620).

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

9855971692 is a wasteful number, since it uses less digits than its factorization.

9855971692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50438 (or 50436 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 61.

The square root of 9855971692 is about 99277.2465975966. The cubic root of 9855971692 is about 2144.0413117063.

The spelling of 9855971692 in words is "nine billion, eight hundred fifty-five million, nine hundred seventy-one thousand, six hundred ninety-two".