520748904722 has 18 divisors (see below), whose sum is σ = 786997760679. Its totient is φ = 258430837740.

The previous prime is 520748904701. The next prime is 520748904743. The reversal of 520748904722 is 227409847025.

It is an interprime number because it is at equal distance from previous prime (520748904701) and next prime (520748904743).

It can be written as a sum of positive squares in only one way, i.e., 260374452361 + 260374452361 = 510269^2 + 510269^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=510269.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 141852947 + ... + 141856617.

Almost surely, 2^520748904722 is an apocalyptic number.

520748904722 is a deficient number, since it is larger than the sum of its proper divisors (266248855957).

520748904722 is an frugal number, since it uses more digits than its factorization.

520748904722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7622 (or 3812 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

Multiplying 520748904722 by its sum of digits (50), we get a square (26037445236100 = 5102690²).

The spelling of 520748904722 in words is "five hundred twenty billion, seven hundred forty-eight million, nine hundred four thousand, seven hundred twenty-two".