561671246069 has 2 divisors, whose sum is σ = 561671246070. Its totient is φ = 561671246068.

The previous prime is 561671246041. The next prime is 561671246077. The reversal of 561671246069 is 960642176165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294317100100 + 267354145969 = 542510^2 + 517063^2 .

It is a cyclic number.

It is not a de Polignac number, because 561671246069 - 2²⁸ = 561402810613 is a prime.

It is a super-2 number, since 2×561671246069² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561671246069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561671246869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280835623034 + 280835623035.

It is an arithmetic number, because the mean of its divisors is an integer number (280835623035).

Almost surely, 2^561671246069 is an apocalyptic number.

It is an amenable number.

561671246069 is a deficient number, since it is larger than the sum of its proper divisors (1).

561671246069 is an equidigital number, since it uses as much as digits as its factorization.

561671246069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 561671246069 in words is "five hundred sixty-one billion, six hundred seventy-one million, two hundred forty-six thousand, sixty-nine".