16443461407421 has 8 divisors (see below), whose sum is σ = 16822296872640. Its totient is φ = 16067963699968.

The previous prime is 16443461407403. The next prime is 16443461407459. The reversal of 16443461407421 is 12470416434461.

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

It is a cyclic number.

It is not a de Polignac number, because 16443461407421 - 2¹⁴ = 16443461391037 is a prime.

It is a super-3 number, since 3×16443461407421³ (a number of 41 digits) contains 333 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 (16443466407421) 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, 834429476 + ... + 834449181.

It is an arithmetic number, because the mean of its divisors is an integer number (2102787109080).

Almost surely, 2^{16443461407421} is an apocalyptic number.

It is an amenable number.

16443461407421 is a deficient number, since it is larger than the sum of its proper divisors (378835465219).

16443461407421 is a wasteful number, since it uses less digits than its factorization.

16443461407421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668878883.

The product of its (nonzero) digits is 1548288, while the sum is 47.

The spelling of 16443461407421 in words is "sixteen trillion, four hundred forty-three billion, four hundred sixty-one million, four hundred seven thousand, four hundred twenty-one".