8361161280 has 672 divisors, whose sum is σ = 32687971200. Its totient is φ = 2005585920.

The previous prime is 8361161257. The next prime is 8361161297. The reversal of 8361161280 is 821611638.

8361161280 is a `hidden beast` number, since 8 + 36 + 1 + 1 + 612 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 157757734 + ... + 157757786.

Almost surely, 2^8361161280 is an apocalyptic number.

8361161280 is a gapful number since it is divisible by the number (80) 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 8361161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16343985600).

8361161280 is an abundant number, since it is smaller than the sum of its proper divisors (24326809920).

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

8361161280 is a wasteful number, since it uses less digits than its factorization.

8361161280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 8361161280 is about 91439.3858247090. The cubic root of 8361161280 is about 2029.6548937313.

The spelling of 8361161280 in words is "eight billion, three hundred sixty-one million, one hundred sixty-one thousand, two hundred eighty".