16708781887 has 16 divisors (see below), whose sum is σ = 20441491200. Its totient is φ = 13338060480.

The previous prime is 16708781861. The next prime is 16708781911. The reversal of 16708781887 is 78818780761.

It is a cyclic number.

It is not a de Polignac number, because 16708781887 - 2¹¹ = 16708779839 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 (16708781827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056814 + ... + 1072507.

It is an arithmetic number, because the mean of its divisors is an integer number (1277593200).

Almost surely, 2^16708781887 is an apocalyptic number.

16708781887 is a deficient number, since it is larger than the sum of its proper divisors (3732709313).

16708781887 is a wasteful number, since it uses less digits than its factorization.

16708781887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129406.

The product of its (nonzero) digits is 8429568, while the sum is 61.

The spelling of 16708781887 in words is "sixteen billion, seven hundred eight million, seven hundred eighty-one thousand, eight hundred eighty-seven".