16471404056421 has 24 divisors (see below), whose sum is σ = 23938280620800. Its totient is φ = 10913639111136.

The previous prime is 16471404056363. The next prime is 16471404056431. The reversal of 16471404056421 is 12465040417461.

16471404056421 is a `hidden beast` number, since 1 + 6 + 4 + 7 + 1 + 40 + 40 + 564 + 2 + 1 = 666.

16471404056421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16471404056421 - 2¹¹ = 16471404054373 is a prime.

It is a super-3 number, since 3×16471404056421³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16471404056431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7542121 + ... + 9477678.

It is an arithmetic number, because the mean of its divisors is an integer number (997428359200).

Almost surely, 2^{16471404056421} is an apocalyptic number.

It is an amenable number.

16471404056421 is a deficient number, since it is larger than the sum of its proper divisors (7466876564379).

16471404056421 is a wasteful number, since it uses less digits than its factorization.

16471404056421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020465 (or 17020462 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 16471404056421 in words is "sixteen trillion, four hundred seventy-one billion, four hundred four million, fifty-six thousand, four hundred twenty-one".