9161811552 has 192 divisors, whose sum is σ = 26135827200. Its totient is φ = 2801018880.

The previous prime is 9161811539. The next prime is 9161811587. The reversal of 9161811552 is 2551181619.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9161811552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7454074 + ... + 7455302.

It is an arithmetic number, because the mean of its divisors is an integer number (136124100).

Almost surely, 2^9161811552 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 9161811552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13067913600).

9161811552 is an abundant number, since it is smaller than the sum of its proper divisors (16974015648).

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

9161811552 is a wasteful number, since it uses less digits than its factorization.

9161811552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1381 counting only the distinct ones).

The product of its digits is 21600, while the sum is 39.

The square root of 9161811552 is about 95717.3524080143. The cubic root of 9161811552 is about 2092.4758364194.

The spelling of 9161811552 in words is "nine billion, one hundred sixty-one million, eight hundred eleven thousand, five hundred fifty-two".