520725704977 has 2 divisors, whose sum is σ = 520725704978. Its totient is φ = 520725704976.

The previous prime is 520725704921. The next prime is 520725704981. The reversal of 520725704977 is 779407527025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295527053376 + 225198651601 = 543624^2 + 474551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520725704977 is a prime.

It is not a weakly prime, because it can be changed into another prime (520725707977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260362852488 + 260362852489.

It is an arithmetic number, because the mean of its divisors is an integer number (260362852489).

Almost surely, 2^520725704977 is an apocalyptic number.

It is an amenable number.

520725704977 is a deficient number, since it is larger than the sum of its proper divisors (1).

520725704977 is an equidigital number, since it uses as much as digits as its factorization.

520725704977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8643600, while the sum is 55.

The spelling of 520725704977 in words is "five hundred twenty billion, seven hundred twenty-five million, seven hundred four thousand, nine hundred seventy-seven".