520020410643 has 32 divisors (see below), whose sum is σ = 811452057600. Its totient is φ = 328229804448.

The previous prime is 520020410639. The next prime is 520020410647. The reversal of 520020410643 is 346014020025.

520020410643 is a `hidden beast` number, since 5 + 2 + 0 + 0 + 2 + 0 + 4 + 10 + 643 = 666.

It is an interprime number because it is at equal distance from previous prime (520020410639) and next prime (520020410647).

It is not a de Polignac number, because 520020410643 - 2² = 520020410639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (520020410647) 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 31 ways as a sum of consecutive naturals, for example, 513246 + ... + 1141692.

It is an arithmetic number, because the mean of its divisors is an integer number (25357876800).

Almost surely, 2^520020410643 is an apocalyptic number.

520020410643 is a deficient number, since it is larger than the sum of its proper divisors (291431646957).

520020410643 is a wasteful number, since it uses less digits than its factorization.

520020410643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630088 (or 630082 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 520020410643 its reverse (346014020025), we get a palindrome (866034430668).

The spelling of 520020410643 in words is "five hundred twenty billion, twenty million, four hundred ten thousand, six hundred forty-three".