521874307320446 has 64 divisors (see below), whose sum is σ = 847980870368256. Its totient is φ = 240289470220800.

The previous prime is 521874307320427. The next prime is 521874307320449. The reversal of 521874307320446 is 644023703478125.

It is a junction number, because it is equal to n+sod(n) for n = 521874307320391 and 521874307320400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521874307320449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29379350 + ... + 43668006.

It is an arithmetic number, because the mean of its divisors is an integer number (13249701099504).

Almost surely, 2^{521874307320446} is an apocalyptic number.

521874307320446 is a deficient number, since it is larger than the sum of its proper divisors (326106563047810).

521874307320446 is a wasteful number, since it uses less digits than its factorization.

521874307320446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289017.

The product of its (nonzero) digits is 27095040, while the sum is 56.

The spelling of 521874307320446 in words is "five hundred twenty-one trillion, eight hundred seventy-four billion, three hundred seven million, three hundred twenty thousand, four hundred forty-six".