520041320840 has 32 divisors (see below), whose sum is σ = 1173565088280. Its totient is φ = 207399263232.

The previous prime is 520041320839. The next prime is 520041320893. The reversal of 520041320840 is 48023140025.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 404401877476 + 115639443364 = 635926^2 + 340058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19275887 + ... + 19302846.

Almost surely, 2^520041320840 is an apocalyptic number.

It is an amenable number.

520041320840 is an abundant number, since it is smaller than the sum of its proper divisors (653523767440).

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

520041320840 is a wasteful number, since it uses less digits than its factorization.

520041320840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38579081 (or 38579077 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 520041320840 its reverse (48023140025), we get a palindrome (568064460865).

The spelling of 520041320840 in words is "five hundred twenty billion, forty-one million, three hundred twenty thousand, eight hundred forty".