16555232878139 has 2 divisors, whose sum is σ = 16555232878140. Its totient is φ = 16555232878138.

The previous prime is 16555232878109. The next prime is 16555232878181. The reversal of 16555232878139 is 93187823255561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16555232878139 - 2²⁴ = 16555216100923 is a prime.

It is not a weakly prime, because it can be changed into another prime (16555232878109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277616439069 + 8277616439070.

It is an arithmetic number, because the mean of its divisors is an integer number (8277616439070).

Almost surely, 2^{16555232878139} is an apocalyptic number.

16555232878139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555232878139 is an equidigital number, since it uses as much as digits as its factorization.

16555232878139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864000, while the sum is 65.

The spelling of 16555232878139 in words is "sixteen trillion, five hundred fifty-five billion, two hundred thirty-two million, eight hundred seventy-eight thousand, one hundred thirty-nine".