8561194560 has 280 divisors, whose sum is σ = 32246727480. Its totient is φ = 2148581376.

The previous prime is 8561194549. The next prime is 8561194583. The reversal of 8561194560 is 654911658.

8561194560 is a `hidden beast` number, since 85 + 6 + 1 + 1 + 9 + 4 + 560 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 107495424 + 8453699136 = 10368^2 + 91944^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 430926 + ... + 450354.

Almost surely, 2^8561194560 is an apocalyptic number.

8561194560 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 8561194560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16123363740).

8561194560 is an abundant number, since it is smaller than the sum of its proper divisors (23685532920).

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

8561194560 is a wasteful number, since it uses less digits than its factorization.

8561194560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19475 (or 19456 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 8561194560 is about 92526.7234911082. The cubic root of 8561194560 is about 2045.7133954111.

The spelling of 8561194560 in words is "eight billion, five hundred sixty-one million, one hundred ninety-four thousand, five hundred sixty".