16405389551 has 2 divisors, whose sum is σ = 16405389552. Its totient is φ = 16405389550.

The previous prime is 16405389529. The next prime is 16405389571. The reversal of 16405389551 is 15598350461.

It is a strong prime.

It is an emirp because it is prime and its reverse (15598350461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16405389551 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 16405389496 and 16405389505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16405389571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202694775 + 8202694776.

It is an arithmetic number, because the mean of its divisors is an integer number (8202694776).

Almost surely, 2^16405389551 is an apocalyptic number.

16405389551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405389551 is an equidigital number, since it uses as much as digits as its factorization.

16405389551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 16405389551 in words is "sixteen billion, four hundred five million, three hundred eighty-nine thousand, five hundred fifty-one".