521874307320447 has 8 divisors (see below), whose sum is σ = 695869507047856. Its totient is φ = 347897656236672.

The previous prime is 521874307320427. The next prime is 521874307320449. The reversal of 521874307320447 is 744023703478125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521874307320447 - 2¹⁰ = 521874307319423 is a prime.

It is a super-2 number, since 2×521874307320447² (a number of 30 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 (521874307320449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4637095258 + ... + 4637207799.

It is an arithmetic number, because the mean of its divisors is an integer number (86983688380982).

Almost surely, 2^{521874307320447} is an apocalyptic number.

521874307320447 is a deficient number, since it is larger than the sum of its proper divisors (173995199727409).

521874307320447 is a wasteful number, since it uses less digits than its factorization.

521874307320447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274321817.

The product of its (nonzero) digits is 31610880, while the sum is 57.

The spelling of 521874307320447 in words is "five hundred twenty-one trillion, eight hundred seventy-four billion, three hundred seven million, three hundred twenty thousand, four hundred forty-seven".