520616401261503 has 16 divisors (see below), whose sum is σ = 695970183966720. Its totient is φ = 346170116384064.

The previous prime is 520616401261447. The next prime is 520616401261543. The reversal of 520616401261503 is 305162104616025.

It is not a de Polignac number, because 520616401261503 - 2²⁶ = 520616334152639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520616401261543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390660075 + ... + 391990467.

It is an arithmetic number, because the mean of its divisors is an integer number (43498136497920).

Almost surely, 2^{520616401261503} is an apocalyptic number.

520616401261503 is a deficient number, since it is larger than the sum of its proper divisors (175353782705217).

520616401261503 is a wasteful number, since it uses less digits than its factorization.

520616401261503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671358.

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 520616401261503 its reverse (305162104616025), we get a palindrome (825778505877528).

The spelling of 520616401261503 in words is "five hundred twenty trillion, six hundred sixteen billion, four hundred one million, two hundred sixty-one thousand, five hundred three".