561071061 has 18 divisors (see below), whose sum is σ = 824451030. Its totient is φ = 367687056.

The previous prime is 561071023. The next prime is 561071081. The reversal of 561071061 is 160170165.

It can be written as a sum of positive squares in only one way, i.e., 466300836 + 94770225 = 21594^2 + 9735^2 .

It is not a de Polignac number, because 561071061 - 2¹⁸ = 560808917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561071081) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22375 + ... + 40283.

It is an arithmetic number, because the mean of its divisors is an integer number (45802835).

Almost surely, 2^561071061 is an apocalyptic number.

It is an amenable number.

561071061 is a deficient number, since it is larger than the sum of its proper divisors (263379969).

561071061 is a wasteful number, since it uses less digits than its factorization.

561071061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18033 (or 17971 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 561071061 is about 23686.9386160390. The cubic root of 561071061 is about 824.7822191000.

The spelling of 561071061 in words is "five hundred sixty-one million, seventy-one thousand, sixty-one".