561612147787357 has 2 divisors, whose sum is σ = 561612147787358. Its totient is φ = 561612147787356.

The previous prime is 561612147787303. The next prime is 561612147787421. The reversal of 561612147787357 is 753787741216165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560690968219396 + 921179567961 = 23678914^2 + 959781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561612147787357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561612147784357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280806073893678 + 280806073893679.

It is an arithmetic number, because the mean of its divisors is an integer number (280806073893679).

Almost surely, 2^{561612147787357} is an apocalyptic number.

It is an amenable number.

561612147787357 is a deficient number, since it is larger than the sum of its proper divisors (1).

561612147787357 is an equidigital number, since it uses as much as digits as its factorization.

561612147787357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414892800, while the sum is 70.

The spelling of 561612147787357 in words is "five hundred sixty-one trillion, six hundred twelve billion, one hundred forty-seven million, seven hundred eighty-seven thousand, three hundred fifty-seven".