16538788045 has 16 divisors (see below), whose sum is σ = 22630451760. Its totient is φ = 11494831104.

The previous prime is 16538788009. The next prime is 16538788117. The reversal of 16538788045 is 54088783561.

It can be written as a sum of positive squares in 8 ways, for example, as 419184676 + 16119603369 = 20474^2 + 126963^2 .

It is a cyclic number.

It is not a de Polignac number, because 16538788045 - 2⁷ = 16538787917 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 15 ways as a sum of consecutive naturals, for example, 7482510 + ... + 7484719.

It is an arithmetic number, because the mean of its divisors is an integer number (1414403235).

Almost surely, 2^16538788045 is an apocalyptic number.

It is an amenable number.

16538788045 is a deficient number, since it is larger than the sum of its proper divisors (6091663715).

16538788045 is a wasteful number, since it uses less digits than its factorization.

16538788045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14967264.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 16538788045 in words is "sixteen billion, five hundred thirty-eight million, seven hundred eighty-eight thousand, forty-five".