520240523964 has 24 divisors (see below), whose sum is σ = 1387308064128. Its totient is φ = 148640149680.

The previous prime is 520240523953. The next prime is 520240523981. The reversal of 520240523964 is 469325042025.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3096669702 + ... + 3096669869.

It is an arithmetic number, because the mean of its divisors is an integer number (57804502672).

Almost surely, 2^520240523964 is an apocalyptic number.

It is an amenable number.

520240523964 is an abundant number, since it is smaller than the sum of its proper divisors (867067540164).

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

520240523964 is a wasteful number, since it uses less digits than its factorization.

520240523964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193339585 (or 6193339583 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 520240523964 its reverse (469325042025), we get a palindrome (989565565989).

The spelling of 520240523964 in words is "five hundred twenty billion, two hundred forty million, five hundred twenty-three thousand, nine hundred sixty-four".