16255655778 has 16 divisors (see below), whose sum is σ = 32513584896. Its totient is φ = 5418173040.

The previous prime is 16255655777. The next prime is 16255655797. The reversal of 16255655778 is 87755655261.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16255655771) by changing a digit.

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, 6568 + ... + 180428.

It is an arithmetic number, because the mean of its divisors is an integer number (2032099056).

Almost surely, 2^16255655778 is an apocalyptic number.

16255655778 is an abundant number, since it is smaller than the sum of its proper divisors (16257929118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16255655778 is a wasteful number, since it uses less digits than its factorization.

16255655778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189449.

The product of its digits is 17640000, while the sum is 57.

The spelling of 16255655778 in words is "sixteen billion, two hundred fifty-five million, six hundred fifty-five thousand, seven hundred seventy-eight".