16405389547 has 8 divisors (see below), whose sum is σ = 16439897120. Its totient is φ = 16370916480.

The previous prime is 16405389529. The next prime is 16405389551. The reversal of 16405389547 is 74598350461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16405389547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16405389494 and 16405389503.

It is not an unprimeable number, because it can be changed into a prime (16405389577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083922 + ... + 1098952.

It is an arithmetic number, because the mean of its divisors is an integer number (2054987140).

Almost surely, 2^16405389547 is an apocalyptic number.

16405389547 is a deficient number, since it is larger than the sum of its proper divisors (34507573).

16405389547 is a wasteful number, since it uses less digits than its factorization.

16405389547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17253.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 16405389547 in words is "sixteen billion, four hundred five million, three hundred eighty-nine thousand, five hundred forty-seven".