16105555440239 has 2 divisors, whose sum is σ = 16105555440240. Its totient is φ = 16105555440238.

The previous prime is 16105555440157. The next prime is 16105555440307. The reversal of 16105555440239 is 93204455550161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16105555440239 - 2¹² = 16105555436143 is a prime.

It is a super-2 number, since 2×16105555440239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16105555442239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052777720119 + 8052777720120.

It is an arithmetic number, because the mean of its divisors is an integer number (8052777720120).

Almost surely, 2^{16105555440239} is an apocalyptic number.

16105555440239 is a deficient number, since it is larger than the sum of its proper divisors (1).

16105555440239 is an equidigital number, since it uses as much as digits as its factorization.

16105555440239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 16105555440239 in words is "sixteen trillion, one hundred five billion, five hundred fifty-five million, four hundred forty thousand, two hundred thirty-nine".