6446520126413 has 4 divisors (see below), whose sum is σ = 6450261579168. Its totient is φ = 6442778673660.

The previous prime is 6446520126407. The next prime is 6446520126511. The reversal of 6446520126413 is 3146210256446.

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 6446520126413 - 2¹⁴ = 6446520110029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446520426413) 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, 1870723793 + ... + 1870727238.

It is an arithmetic number, because the mean of its divisors is an integer number (1612565394792).

Almost surely, 2^{6446520126413} is an apocalyptic number.

It is an amenable number.

6446520126413 is a deficient number, since it is larger than the sum of its proper divisors (3741452755).

6446520126413 is a wasteful number, since it uses less digits than its factorization.

6446520126413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741452754.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 6446520126413 in words is "six trillion, four hundred forty-six billion, five hundred twenty million, one hundred twenty-six thousand, four hundred thirteen".