520725705172 has 24 divisors (see below), whose sum is σ = 918075700584. Its totient is φ = 258419000832.

The previous prime is 520725705139. The next prime is 520725705179. The reversal of 520725705172 is 271507527025.

It can be written as a sum of positive squares in 4 ways, for example, as 32175031876 + 488550673296 = 179374^2 + 698964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520725705179) 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 7 ways as a sum of consecutive naturals, for example, 3319288 + ... + 3472624.

It is an arithmetic number, because the mean of its divisors is an integer number (38253154191).

Almost surely, 2^520725705172 is an apocalyptic number.

It is an amenable number.

520725705172 is a deficient number, since it is larger than the sum of its proper divisors (397349995412).

520725705172 is a wasteful number, since it uses less digits than its factorization.

520725705172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159675 (or 159673 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 43.

The spelling of 520725705172 in words is "five hundred twenty billion, seven hundred twenty-five million, seven hundred five thousand, one hundred seventy-two".