561730535537 has 2 divisors, whose sum is σ = 561730535538. Its totient is φ = 561730535536.

The previous prime is 561730535477. The next prime is 561730535557. The reversal of 561730535537 is 735535037165.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419166899761 + 142563635776 = 647431^2 + 377576^2 .

It is a cyclic number.

It is not a de Polignac number, because 561730535537 - 2²² = 561726341233 is a prime.

It is not a weakly prime, because it can be changed into another prime (561730535557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280865267768 + 280865267769.

It is an arithmetic number, because the mean of its divisors is an integer number (280865267769).

Almost surely, 2^561730535537 is an apocalyptic number.

It is an amenable number.

561730535537 is a deficient number, since it is larger than the sum of its proper divisors (1).

561730535537 is an equidigital number, since it uses as much as digits as its factorization.

561730535537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4961250, while the sum is 50.

The spelling of 561730535537 in words is "five hundred sixty-one billion, seven hundred thirty million, five hundred thirty-five thousand, five hundred thirty-seven".