520365649866943 has 2 divisors, whose sum is σ = 520365649866944. Its totient is φ = 520365649866942.

The previous prime is 520365649866851. The next prime is 520365649866961. The reversal of 520365649866943 is 349668946563025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520365649866943 is a prime.

It is a super-2 number, since 2×520365649866943² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520365649866943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520365649866743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260182824933471 + 260182824933472.

It is an arithmetic number, because the mean of its divisors is an integer number (260182824933472).

Almost surely, 2^{520365649866943} is an apocalyptic number.

520365649866943 is a deficient number, since it is larger than the sum of its proper divisors (1).

520365649866943 is an equidigital number, since it uses as much as digits as its factorization.

520365649866943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6046617600, while the sum is 76.

The spelling of 520365649866943 in words is "five hundred twenty trillion, three hundred sixty-five billion, six hundred forty-nine million, eight hundred sixty-six thousand, nine hundred forty-three".