561017340 has 240 divisors, whose sum is σ = 2008081152. Its totient is φ = 129890304.

The previous prime is 561017339. The next prime is 561017377. The reversal of 561017340 is 43710165.

561017340 is a `hidden beast` number, since 5 + 610 + 1 + 7 + 3 + 40 = 666.

561017340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 357237 + ... + 358803.

Almost surely, 2^561017340 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 561017340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004040576).

561017340 is an abundant number, since it is smaller than the sum of its proper divisors (1447063812).

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

561017340 is a wasteful number, since it uses less digits than its factorization.

561017340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 561017340 is about 23685.8046095124. The cubic root of 561017340 is about 824.7558947221.

The spelling of 561017340 in words is "five hundred sixty-one million, seventeen thousand, three hundred forty".