16869781045 has 8 divisors (see below), whose sum is σ = 21800947896. Its totient is φ = 12457684416.

The previous prime is 16869781021. The next prime is 16869781067. The reversal of 16869781045 is 54018796861.

It can be written as a sum of positive squares in 4 ways, for example, as 3729056356 + 13140724689 = 61066^2 + 114633^2 .

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 16869781045 - 2⁵ = 16869781013 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 129767482 + ... + 129767611.

It is an arithmetic number, because the mean of its divisors is an integer number (2725118487).

Almost surely, 2^16869781045 is an apocalyptic number.

It is an amenable number.

16869781045 is a deficient number, since it is larger than the sum of its proper divisors (4931166851).

16869781045 is a wasteful number, since it uses less digits than its factorization.

16869781045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259535111.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 16869781045 in words is "sixteen billion, eight hundred sixty-nine million, seven hundred eighty-one thousand, forty-five".