16111226165165 has 8 divisors (see below), whose sum is σ = 19340859060600. Its totient is φ = 12884055823872.

The previous prime is 16111226165129. The next prime is 16111226165233. The reversal of 16111226165165 is 56156162211161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1657702600324 + 14453523564841 = 1287518^2 + 3801779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16111226165165 - 2¹⁸ = 16111225903021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615624140 + ... + 615650309.

It is an arithmetic number, because the mean of its divisors is an integer number (2417607382575).

Almost surely, 2^{16111226165165} is an apocalyptic number.

It is an amenable number.

16111226165165 is a deficient number, since it is larger than the sum of its proper divisors (3229632895435).

16111226165165 is a wasteful number, since it uses less digits than its factorization.

16111226165165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231277071.

The product of its digits is 129600, while the sum is 44.

The spelling of 16111226165165 in words is "sixteen trillion, one hundred eleven billion, two hundred twenty-six million, one hundred sixty-five thousand, one hundred sixty-five".