520009784401 has 2 divisors, whose sum is σ = 520009784402. Its totient is φ = 520009784400.

The previous prime is 520009784341. The next prime is 520009784417. The reversal of 520009784401 is 104487900025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503439916225 + 16569868176 = 709535^2 + 128724^2 .

It is a cyclic number.

It is not a de Polignac number, because 520009784401 - 2¹⁵ = 520009751633 is a prime.

It is not a weakly prime, because it can be changed into another prime (520009784431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260004892200 + 260004892201.

It is an arithmetic number, because the mean of its divisors is an integer number (260004892201).

Almost surely, 2^520009784401 is an apocalyptic number.

It is an amenable number.

520009784401 is a deficient number, since it is larger than the sum of its proper divisors (1).

520009784401 is an equidigital number, since it uses as much as digits as its factorization.

520009784401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 520009784401 in words is "five hundred twenty billion, nine million, seven hundred eighty-four thousand, four hundred one".