6520071648423 has 4 divisors (see below), whose sum is σ = 8693428864568. Its totient is φ = 4346714432280.

The previous prime is 6520071648371. The next prime is 6520071648427. The reversal of 6520071648423 is 3248461700256.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6520071648423 - 2¹² = 6520071644327 is a prime.

It is a super-2 number, since 2×6520071648423² (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 (6520071648427) 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, 1086678608068 + ... + 1086678608073.

It is an arithmetic number, because the mean of its divisors is an integer number (2173357216142).

Almost surely, 2^{6520071648423} is an apocalyptic number.

6520071648423 is a deficient number, since it is larger than the sum of its proper divisors (2173357216145).

6520071648423 is a wasteful number, since it uses less digits than its factorization.

6520071648423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173357216144.

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 6520071648423 in words is "six trillion, five hundred twenty billion, seventy-one million, six hundred forty-eight thousand, four hundred twenty-three".