561383064 has 96 divisors (see below), whose sum is σ = 1662897600. Its totient is φ = 169679040.

The previous prime is 561383051. The next prime is 561383071. The reversal of 561383064 is 460383165.

561383064 is a `hidden beast` number, since 5 + 613 + 8 + 30 + 6 + 4 = 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 23 ways as a sum of consecutive naturals, for example, 445267 + ... + 446525.

It is an arithmetic number, because the mean of its divisors is an integer number (17321850).

Almost surely, 2^561383064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561383064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831448800).

561383064 is an abundant number, since it is smaller than the sum of its proper divisors (1101514536).

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

561383064 is a wasteful number, since it uses less digits than its factorization.

561383064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 561383064 is about 23693.5236720923. The cubic root of 561383064 is about 824.9350736784.

The spelling of 561383064 in words is "five hundred sixty-one million, three hundred eighty-three thousand, sixty-four".