561000061 has 8 divisors (see below), whose sum is σ = 616201920. Its totient is φ = 508365792.

The previous prime is 561000047. The next prime is 561000073. The reversal of 561000061 is 160000165.

561000061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561000061 - 2¹¹ = 560998013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561000091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641440 + ... + 642313.

It is an arithmetic number, because the mean of its divisors is an integer number (77025240).

Almost surely, 2^561000061 is an apocalyptic number.

It is an amenable number.

561000061 is a deficient number, since it is larger than the sum of its proper divisors (55201859).

561000061 is a wasteful number, since it uses less digits than its factorization.

561000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283795.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 561000061 is about 23685.4398523650. The cubic root of 561000061 is about 824.7474273051.

The spelling of 561000061 in words is "five hundred sixty-one million, sixty-one", and thus it is an aban number.