520321611665163 has 128 divisors (see below), whose sum is σ = 926578010972160. Its totient is φ = 253677573705600.

The previous prime is 520321611665153. The next prime is 520321611665227. The reversal of 520321611665163 is 361566116123025.

It is not a de Polignac number, because 520321611665163 - 2⁴ = 520321611665147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520321611665153) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 52246053 + ... + 61402713.

It is an arithmetic number, because the mean of its divisors is an integer number (7238890710720).

Almost surely, 2^{520321611665163} is an apocalyptic number.

520321611665163 is a deficient number, since it is larger than the sum of its proper divisors (406256399306997).

520321611665163 is a wasteful number, since it uses less digits than its factorization.

520321611665163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9156830 (or 9156808 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

Adding to 520321611665163 its reverse (361566116123025), we get a palindrome (881887727788188).

The spelling of 520321611665163 in words is "five hundred twenty trillion, three hundred twenty-one billion, six hundred eleven million, six hundred sixty-five thousand, one hundred sixty-three".