16156161265 has 8 divisors (see below), whose sum is σ = 19395350568. Its totient is φ = 12919624320.

The previous prime is 16156161223. The next prime is 16156161277. The reversal of 16156161265 is 56216165161.

It can be written as a sum of positive squares in 4 ways, for example, as 734449 + 16155426816 = 857^2 + 127104^2 .

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

It is not a de Polignac number, because 16156161265 - 2⁹ = 16156160753 is a prime.

It is a super-2 number, since 2×16156161265² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 649662 + ... + 674071.

It is an arithmetic number, because the mean of its divisors is an integer number (2424418821).

Almost surely, 2^16156161265 is an apocalyptic number.

It is an amenable number.

16156161265 is a deficient number, since it is larger than the sum of its proper divisors (3239189303).

16156161265 is a wasteful number, since it uses less digits than its factorization.

16156161265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326179.

The product of its digits is 64800, while the sum is 40.

The spelling of 16156161265 in words is "sixteen billion, one hundred fifty-six million, one hundred sixty-one thousand, two hundred sixty-five".