520387620031777 has 2 divisors, whose sum is σ = 520387620031778. Its totient is φ = 520387620031776.

The previous prime is 520387620031733. The next prime is 520387620031781. The reversal of 520387620031777 is 777130026783025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490632733353361 + 29754886678416 = 22150231^2 + 5454804^2 .

It is a cyclic number.

It is not a de Polignac number, because 520387620031777 - 2⁴⁷ = 379650131676449 is a prime.

It is a super-2 number, since 2×520387620031777² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520387620031577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260193810015888 + 260193810015889.

It is an arithmetic number, because the mean of its divisors is an integer number (260193810015889).

Almost surely, 2^{520387620031777} is an apocalyptic number.

It is an amenable number.

520387620031777 is a deficient number, since it is larger than the sum of its proper divisors (1).

520387620031777 is an equidigital number, since it uses as much as digits as its factorization.

520387620031777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20744640, while the sum is 58.

The spelling of 520387620031777 in words is "five hundred twenty trillion, three hundred eighty-seven billion, six hundred twenty million, thirty-one thousand, seven hundred seventy-seven".