506250601561 has 2 divisors, whose sum is σ = 506250601562. Its totient is φ = 506250601560.

The previous prime is 506250601559. The next prime is 506250601603. The reversal of 506250601561 is 165106052605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318271992336 + 187978609225 = 564156^2 + 433565^2 .

It is a cyclic number.

It is not a de Polignac number, because 506250601561 - 2¹ = 506250601559 is a prime.

Together with 506250601559, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 506250601561.

It is not a weakly prime, because it can be changed into another prime (506250601501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253125300780 + 253125300781.

It is an arithmetic number, because the mean of its divisors is an integer number (253125300781).

Almost surely, 2^506250601561 is an apocalyptic number.

It is an amenable number.

506250601561 is a deficient number, since it is larger than the sum of its proper divisors (1).

506250601561 is an equidigital number, since it uses as much as digits as its factorization.

506250601561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 506250601561 in words is "five hundred six billion, two hundred fifty million, six hundred one thousand, five hundred sixty-one".