16538777875 has 16 divisors (see below), whose sum is σ = 20644640640. Its totient is φ = 13228300800.

The previous prime is 16538777861. The next prime is 16538777933. The reversal of 16538777875 is 57877783561.

It is not a de Polignac number, because 16538777875 - 2⁹ = 16538777363 is a prime.

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, 781686 + ... + 802564.

It is an arithmetic number, because the mean of its divisors is an integer number (1290290040).

Almost surely, 2^16538777875 is an apocalyptic number.

16538777875 is a deficient number, since it is larger than the sum of its proper divisors (4105862765).

16538777875 is an equidigital number, since it uses as much as digits as its factorization.

16538777875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231 (or 27221 counting only the distinct ones).

The product of its digits is 69148800, while the sum is 64.

The spelling of 16538777875 in words is "sixteen billion, five hundred thirty-eight million, seven hundred seventy-seven thousand, eight hundred seventy-five".