520990184485 has 4 divisors (see below), whose sum is σ = 625188221388. Its totient is φ = 416792147584.

The previous prime is 520990184471. The next prime is 520990184509. The reversal of 520990184485 is 584481099025.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123870914209 + 397119270276 = 351953^2 + 630174^2 .

It is a cyclic number.

It is not a de Polignac number, because 520990184485 - 2²⁵ = 520956630053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52099018444 + ... + 52099018453.

It is an arithmetic number, because the mean of its divisors is an integer number (156297055347).

Almost surely, 2^520990184485 is an apocalyptic number.

It is an amenable number.

520990184485 is a deficient number, since it is larger than the sum of its proper divisors (104198036903).

520990184485 is a wasteful number, since it uses less digits than its factorization.

520990184485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104198036902.

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 520990184485 in words is "five hundred twenty billion, nine hundred ninety million, one hundred eighty-four thousand, four hundred eighty-five".