6520536121357 has 2 divisors, whose sum is σ = 6520536121358. Its totient is φ = 6520536121356.

The previous prime is 6520536121301. The next prime is 6520536121381. The reversal of 6520536121357 is 7531216350256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4185076696516 + 2335459424841 = 2045746^2 + 1528221^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520536121357 - 2¹¹ = 6520536119309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520536121657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260268060678 + 3260268060679.

It is an arithmetic number, because the mean of its divisors is an integer number (3260268060679).

Almost surely, 2^{6520536121357} is an apocalyptic number.

It is an amenable number.

6520536121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520536121357 is an equidigital number, since it uses as much as digits as its factorization.

6520536121357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 6520536121357 in words is "six trillion, five hundred twenty billion, five hundred thirty-six million, one hundred twenty-one thousand, three hundred fifty-seven".