520498378013 has 4 divisors (see below), whose sum is σ = 529320384480. Its totient is φ = 511676371548.

The previous prime is 520498378009. The next prime is 520498378021. The reversal of 520498378013 is 310873894025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520498378013 - 2² = 520498378009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520498378613) 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, 4411003145 + ... + 4411003262.

It is an arithmetic number, because the mean of its divisors is an integer number (132330096120).

Almost surely, 2^520498378013 is an apocalyptic number.

It is an amenable number.

520498378013 is a deficient number, since it is larger than the sum of its proper divisors (8822006467).

520498378013 is an equidigital number, since it uses as much as digits as its factorization.

520498378013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8822006466.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 520498378013 in words is "five hundred twenty billion, four hundred ninety-eight million, three hundred seventy-eight thousand, thirteen".