520157659 has 24 divisors (see below), whose sum is σ = 620848800. Its totient is φ = 426865152.

The previous prime is 520157647. The next prime is 520157663. The reversal of 520157659 is 956751025.

It is not a de Polignac number, because 520157659 - 2¹⁷ = 520026587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520157669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876867 + ... + 877459.

It is an arithmetic number, because the mean of its divisors is an integer number (25868700).

Almost surely, 2^520157659 is an apocalyptic number.

520157659 is a deficient number, since it is larger than the sum of its proper divisors (100691141).

520157659 is a wasteful number, since it uses less digits than its factorization.

520157659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 520157659 is about 22806.9651422542. The cubic root of 520157659 is about 804.2264131984.

The spelling of 520157659 in words is "five hundred twenty million, one hundred fifty-seven thousand, six hundred fifty-nine".