520778450963 has 4 divisors (see below), whose sum is σ = 520842840120. Its totient is φ = 520714061808.

The previous prime is 520778450923. The next prime is 520778451023. The reversal of 520778450963 is 369054877025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520778450963 - 2⁸ = 520778450707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520778450899 and 520778450908.

It is not an unprimeable number, because it can be changed into a prime (520778450923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32182445 + ... + 32198622.

It is an arithmetic number, because the mean of its divisors is an integer number (130210710030).

Almost surely, 2^520778450963 is an apocalyptic number.

520778450963 is a deficient number, since it is larger than the sum of its proper divisors (64389157).

520778450963 is an equidigital number, since it uses as much as digits as its factorization.

520778450963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64389156.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 520778450963 in words is "five hundred twenty billion, seven hundred seventy-eight million, four hundred fifty thousand, nine hundred sixty-three".