6520536122381 has 4 divisors (see below), whose sum is σ = 6521130043200. Its totient is φ = 6519942201564.

The previous prime is 6520536122227. The next prime is 6520536122389. The reversal of 6520536122381 is 1832216350256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6520536122381 - 2¹⁰ = 6520536121357 is a prime.

It is a super-2 number, since 2×6520536122381² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520536122389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296943941 + ... + 296965898.

It is an arithmetic number, because the mean of its divisors is an integer number (1630282510800).

Almost surely, 2^{6520536122381} is an apocalyptic number.

It is an amenable number.

6520536122381 is a deficient number, since it is larger than the sum of its proper divisors (593920819).

6520536122381 is a wasteful number, since it uses less digits than its factorization.

6520536122381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593920818.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 6520536122381 in words is "six trillion, five hundred twenty billion, five hundred thirty-six million, one hundred twenty-two thousand, three hundred eighty-one".