6520536122389 has 2 divisors, whose sum is σ = 6520536122390. Its totient is φ = 6520536122388.

The previous prime is 6520536122227. The next prime is 6520536122413. The reversal of 6520536122389 is 9832216350256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5614136919889 + 906399202500 = 2369417^2 + 952050^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520536122389 - 2²¹ = 6520534025237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520536123389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260268061194 + 3260268061195.

It is an arithmetic number, because the mean of its divisors is an integer number (3260268061195).

Almost surely, 2^{6520536122389} is an apocalyptic number.

It is an amenable number.

6520536122389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520536122389 is an equidigital number, since it uses as much as digits as its factorization.

6520536122389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 6520536122389 in words is "six trillion, five hundred twenty billion, five hundred thirty-six million, one hundred twenty-two thousand, three hundred eighty-nine".