506891608061 has 2 divisors, whose sum is σ = 506891608062. Its totient is φ = 506891608060.

The previous prime is 506891608039. The next prime is 506891608099. The reversal of 506891608061 is 160806198605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297499339225 + 209392268836 = 545435^2 + 457594^2 .

It is a cyclic number.

It is not a de Polignac number, because 506891608061 - 2⁶ = 506891607997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506891608001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253445804030 + 253445804031.

It is an arithmetic number, because the mean of its divisors is an integer number (253445804031).

Almost surely, 2^506891608061 is an apocalyptic number.

It is an amenable number.

506891608061 is a deficient number, since it is larger than the sum of its proper divisors (1).

506891608061 is an equidigital number, since it uses as much as digits as its factorization.

506891608061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 506891608061 in words is "five hundred six billion, eight hundred ninety-one million, six hundred eight thousand, sixty-one".