8961178156 has 48 divisors (see below), whose sum is σ = 18387984384. Its totient is φ = 3741204096.

The previous prime is 8961178151. The next prime is 8961178157. The reversal of 8961178156 is 6518711698.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8961178151) 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 15 ways as a sum of consecutive naturals, for example, 451416 + ... + 470848.

It is an arithmetic number, because the mean of its divisors is an integer number (383083008).

Almost surely, 2^8961178156 is an apocalyptic number.

8961178156 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8961178156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9193992192).

8961178156 is an abundant number, since it is smaller than the sum of its proper divisors (9426806228).

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

8961178156 is a wasteful number, since it uses less digits than its factorization.

8961178156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19870 (or 19868 counting only the distinct ones).

The product of its digits is 725760, while the sum is 52.

The square root of 8961178156 is about 94663.4995972577. The cubic root of 8961178156 is about 2077.0886719899.

The spelling of 8961178156 in words is "eight billion, nine hundred sixty-one million, one hundred seventy-eight thousand, one hundred fifty-six".