520945644897 has 12 divisors (see below), whose sum is σ = 752512977684. Its totient is φ = 347280511200.

The previous prime is 520945644847. The next prime is 520945644953. The reversal of 520945644897 is 798446549025.

520945644897 is a `hidden beast` number, since 5 + 2 + 0 + 94 + 5 + 64 + 489 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 73757869056 + 447187775841 = 271584^2 + 668721^2 .

It is not a de Polignac number, because 520945644897 - 2¹² = 520945640801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520945644847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1181658 + ... + 1561475.

It is an arithmetic number, because the mean of its divisors is an integer number (62709414807).

Almost surely, 2^520945644897 is an apocalyptic number.

It is an amenable number.

520945644897 is a deficient number, since it is larger than the sum of its proper divisors (231567332787).

520945644897 is a wasteful number, since it uses less digits than its factorization.

520945644897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764240 (or 2764237 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 520945644897 in words is "five hundred twenty billion, nine hundred forty-five million, six hundred forty-four thousand, eight hundred ninety-seven".