561947085 has 32 divisors (see below), whose sum is σ = 1141735680. Its totient is φ = 256889664.

The previous prime is 561947081. The next prime is 561947131. The reversal of 561947085 is 580749165.

561947085 is a `hidden beast` number, since 561 + 9 + 4 + 7 + 0 + 85 = 666.

It is not a de Polignac number, because 561947085 - 2² = 561947081 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 561947085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561947081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296382 + ... + 298271.

It is an arithmetic number, because the mean of its divisors is an integer number (35679240).

Almost surely, 2^561947085 is an apocalyptic number.

It is an amenable number.

561947085 is an abundant number, since it is smaller than the sum of its proper divisors (579788595).

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

561947085 is a wasteful number, since it uses less digits than its factorization.

561947085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594674 (or 594668 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 561947085 is about 23705.4231137097. The cubic root of 561947085 is about 825.2112516868.

The spelling of 561947085 in words is "five hundred sixty-one million, nine hundred forty-seven thousand, eighty-five".