16887355405 has 8 divisors (see below), whose sum is σ = 20267090712. Its totient is φ = 13508374848.

The previous prime is 16887355393. The next prime is 16887355409. The reversal of 16887355405 is 50455378861.

It can be written as a sum of positive squares in 4 ways, for example, as 2006771209 + 14880584196 = 44797^2 + 121986^2 .

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 16887355405 - 2²¹ = 16885258253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16887355409) 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, 138234 + ... + 229963.

It is an arithmetic number, because the mean of its divisors is an integer number (2533386339).

Almost surely, 2^16887355405 is an apocalyptic number.

It is an amenable number.

16887355405 is a deficient number, since it is larger than the sum of its proper divisors (3379735307).

16887355405 is an equidigital number, since it uses as much as digits as its factorization.

16887355405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377375.

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 16887355405 in words is "sixteen billion, eight hundred eighty-seven million, three hundred fifty-five thousand, four hundred five".