561717504 has 180 divisors, whose sum is σ = 1697631936. Its totient is φ = 184716288.

The previous prime is 561717503. The next prime is 561717529. The reversal of 561717504 is 405717165.

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

It is not an unprimeable number, because it can be changed into a prime (561717503) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2135677 + ... + 2135939.

Almost surely, 2^561717504 is an apocalyptic number.

561717504 is a gapful number since it is divisible by the number (54) 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 561717504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848815968).

561717504 is an abundant number, since it is smaller than the sum of its proper divisors (1135914432).

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

561717504 is a wasteful number, since it uses less digits than its factorization.

561717504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 561717504 is about 23700.5802460615. The cubic root of 561717504 is about 825.0988575752.

The spelling of 561717504 in words is "five hundred sixty-one million, seven hundred seventeen thousand, five hundred four".