520703214501640 has 16 divisors (see below), whose sum is σ = 1171582232628780. Its totient is φ = 208281285800640.

The previous prime is 520703214501611. The next prime is 520703214501641. The reversal of 520703214501640 is 46105412307025.

It can be written as a sum of positive squares in 2 ways, for example, as 502122855977604 + 18580358524036 = 22408098^2 + 4310494^2 .

It is a super-2 number, since 2×520703214501640² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 13017580362541 = 520703214501640 / (5 + 2 + 0 + 7 + 0 + 3 + 2 + 1 + 4 + 5 + 0 + 1 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 520703214501593 and 520703214501602.

It is not an unprimeable number, because it can be changed into a prime (520703214501641) 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 3 ways as a sum of consecutive naturals, for example, 6508790181231 + ... + 6508790181310.

Almost surely, 2^{520703214501640} is an apocalyptic number.

It is an amenable number.

520703214501640 is an abundant number, since it is smaller than the sum of its proper divisors (650879018127140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520703214501640 is a wasteful number, since it uses less digits than its factorization.

520703214501640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13017580362552 (or 13017580362548 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

Adding to 520703214501640 its reverse (46105412307025), we get a palindrome (566808626808665).

The spelling of 520703214501640 in words is "five hundred twenty trillion, seven hundred three billion, two hundred fourteen million, five hundred one thousand, six hundred forty".