520944349591 has 8 divisors (see below), whose sum is σ = 531030757680. Its totient is φ = 510937676352.

The previous prime is 520944349579. The next prime is 520944349621. The reversal of 520944349591 is 195943449025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520944349591 - 2¹⁷ = 520944218519 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 (520944349571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19920520 + ... + 19946653.

It is an arithmetic number, because the mean of its divisors is an integer number (66378844710).

Almost surely, 2^520944349591 is an apocalyptic number.

520944349591 is a deficient number, since it is larger than the sum of its proper divisors (10086408089).

520944349591 is a wasteful number, since it uses less digits than its factorization.

520944349591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39867425.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 520944349591 in words is "five hundred twenty billion, nine hundred forty-four million, three hundred forty-nine thousand, five hundred ninety-one".