561500539157 has 2 divisors, whose sum is σ = 561500539158. Its totient is φ = 561500539156.

The previous prime is 561500539133. The next prime is 561500539207. The reversal of 561500539157 is 751935005165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297113296561 + 264387242596 = 545081^2 + 514186^2 .

It is a cyclic number.

It is not a de Polignac number, because 561500539157 - 2¹⁶ = 561500473621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561500539057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280750269578 + 280750269579.

It is an arithmetic number, because the mean of its divisors is an integer number (280750269579).

Almost surely, 2^561500539157 is an apocalyptic number.

It is an amenable number.

561500539157 is a deficient number, since it is larger than the sum of its proper divisors (1).

561500539157 is an equidigital number, since it uses as much as digits as its factorization.

561500539157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708750, while the sum is 47.

The spelling of 561500539157 in words is "five hundred sixty-one billion, five hundred million, five hundred thirty-nine thousand, one hundred fifty-seven".