520988716664 has 64 divisors (see below), whose sum is σ = 1075441933440. Its totient is φ = 235107486720.

The previous prime is 520988716663. The next prime is 520988716697. The reversal of 520988716664 is 466617889025.

It is a junction number, because it is equal to n+sod(n) for n = 520988716597 and 520988716606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520988716663) 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, 4938452 + ... + 5042844.

It is an arithmetic number, because the mean of its divisors is an integer number (16803780210).

Almost surely, 2^520988716664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520988716664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537720966720).

520988716664 is an abundant number, since it is smaller than the sum of its proper divisors (554453216776).

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

520988716664 is a wasteful number, since it uses less digits than its factorization.

520988716664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105480 (or 105476 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 520988716664 in words is "five hundred twenty billion, nine hundred eighty-eight million, seven hundred sixteen thousand, six hundred sixty-four".