16421443715 has 8 divisors (see below), whose sum is σ = 19708357920. Its totient is φ = 13135404672.

The previous prime is 16421443681. The next prime is 16421443751. The reversal of 16421443715 is 51734412461.

16421443715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16421443715 - 2¹⁰ = 16421442691 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176774 + ... + 253163.

It is an arithmetic number, because the mean of its divisors is an integer number (2463544740).

Almost surely, 2^16421443715 is an apocalyptic number.

16421443715 is a deficient number, since it is larger than the sum of its proper divisors (3286914205).

16421443715 is an equidigital number, since it uses as much as digits as its factorization.

16421443715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437581.

The product of its digits is 80640, while the sum is 38.

The spelling of 16421443715 in words is "sixteen billion, four hundred twenty-one million, four hundred forty-three thousand, seven hundred fifteen".