561163086 has 64 divisors (see below), whose sum is σ = 1368783360. Its totient is φ = 169001280.

The previous prime is 561163063. The next prime is 561163103. The reversal of 561163086 is 680361165.

It is a happy number.

561163086 is a `hidden beast` number, since 5 + 6 + 11 + 630 + 8 + 6 = 666.

561163086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 561163086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96370 + ... + 102026.

It is an arithmetic number, because the mean of its divisors is an integer number (21387240).

Almost surely, 2^561163086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561163086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684391680).

561163086 is an abundant number, since it is smaller than the sum of its proper divisors (807620274).

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

561163086 is a wasteful number, since it uses less digits than its factorization.

561163086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 561163086 is about 23688.8810626420. The cubic root of 561163086 is about 824.8273093091.

The spelling of 561163086 in words is "five hundred sixty-one million, one hundred sixty-three thousand, eighty-six".