561763364873 has 2 divisors, whose sum is σ = 561763364874. Its totient is φ = 561763364872.

The previous prime is 561763364867. The next prime is 561763364909. The reversal of 561763364873 is 378463367165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520083284224 + 41680080649 = 721168^2 + 204157^2 .

It is a cyclic number.

It is not a de Polignac number, because 561763364873 - 2⁶ = 561763364809 is a prime.

It is a super-2 number, since 2×561763364873² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (561763364573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280881682436 + 280881682437.

It is an arithmetic number, because the mean of its divisors is an integer number (280881682437).

Almost surely, 2^561763364873 is an apocalyptic number.

It is an amenable number.

561763364873 is a deficient number, since it is larger than the sum of its proper divisors (1).

561763364873 is an equidigital number, since it uses as much as digits as its factorization.

561763364873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 59.

The spelling of 561763364873 in words is "five hundred sixty-one billion, seven hundred sixty-three million, three hundred sixty-four thousand, eight hundred seventy-three".