520945640801 has 2 divisors, whose sum is σ = 520945640802. Its totient is φ = 520945640800.

The previous prime is 520945640797. The next prime is 520945640807. The reversal of 520945640801 is 108046549025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357245290000 + 163700350801 = 597700^2 + 404599^2 .

It is a cyclic number.

It is not a de Polignac number, because 520945640801 - 2² = 520945640797 is a prime.

It is not a weakly prime, because it can be changed into another prime (520945640807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260472820400 + 260472820401.

It is an arithmetic number, because the mean of its divisors is an integer number (260472820401).

Almost surely, 2^520945640801 is an apocalyptic number.

It is an amenable number.

520945640801 is a deficient number, since it is larger than the sum of its proper divisors (1).

520945640801 is an equidigital number, since it uses as much as digits as its factorization.

520945640801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 520945640801 in words is "five hundred twenty billion, nine hundred forty-five million, six hundred forty thousand, eight hundred one".