520561262779 has 2 divisors, whose sum is σ = 520561262780. Its totient is φ = 520561262778.

The previous prime is 520561262761. The next prime is 520561262813. The reversal of 520561262779 is 977262165025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520561262779 - 2⁹ = 520561262267 is a prime.

It is not a weakly prime, because it can be changed into another prime (520561262719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260280631389 + 260280631390.

It is an arithmetic number, because the mean of its divisors is an integer number (260280631390).

Almost surely, 2^520561262779 is an apocalyptic number.

520561262779 is a deficient number, since it is larger than the sum of its proper divisors (1).

520561262779 is an equidigital number, since it uses as much as digits as its factorization.

520561262779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 520561262779 in words is "five hundred twenty billion, five hundred sixty-one million, two hundred sixty-two thousand, seven hundred seventy-nine".