520545511234545 has 16 divisors (see below), whose sum is σ = 838952181613440. Its totient is φ = 275597818112384.

The previous prime is 520545511234513. The next prime is 520545511234549. The reversal of 520545511234545 is 545432115545025.

It is a cyclic number.

It is not a de Polignac number, because 520545511234545 - 2⁵ = 520545511234513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520545511234549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126653407005 + ... + 126653411114.

It is an arithmetic number, because the mean of its divisors is an integer number (52434511350840).

Almost surely, 2^{520545511234545} is an apocalyptic number.

It is an amenable number.

520545511234545 is a deficient number, since it is larger than the sum of its proper divisors (318406670378895).

520545511234545 is a wasteful number, since it uses less digits than its factorization.

520545511234545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253306818264.

The product of its (nonzero) digits is 12000000, while the sum is 51.

The spelling of 520545511234545 in words is "five hundred twenty trillion, five hundred forty-five billion, five hundred eleven million, two hundred thirty-four thousand, five hundred forty-five".