9161881652 has 24 divisors (see below), whose sum is σ = 19989560640. Its totient is φ = 3569564160.

The previous prime is 9161881649. The next prime is 9161881657. The reversal of 9161881652 is 2561881619.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9161881597 and 9161881606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9161881657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14872877 + ... + 14873492.

It is an arithmetic number, because the mean of its divisors is an integer number (832898360).

Almost surely, 2^9161881652 is an apocalyptic number.

It is an amenable number.

9161881652 is an abundant number, since it is smaller than the sum of its proper divisors (10827678988).

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

9161881652 is a wasteful number, since it uses less digits than its factorization.

9161881652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29746391 (or 29746389 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 9161881652 is about 95717.7185896112. The cubic root of 9161881652 is about 2092.4811731435.

The spelling of 9161881652 in words is "nine billion, one hundred sixty-one million, eight hundred eighty-one thousand, six hundred fifty-two".