16159991291 has 16 divisors (see below), whose sum is σ = 18470203200. Its totient is φ = 14046455808.

The previous prime is 16159991279. The next prime is 16159991339. The reversal of 16159991291 is 19219995161.

It is a cyclic number.

It is not a de Polignac number, because 16159991291 - 2⁶ = 16159991227 is a prime.

It is a super-2 number, since 2×16159991291² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16159991201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701246 + ... + 723923.

It is an arithmetic number, because the mean of its divisors is an integer number (1154387700).

Almost surely, 2^16159991291 is an apocalyptic number.

16159991291 is a deficient number, since it is larger than the sum of its proper divisors (2310211909).

16159991291 is a wasteful number, since it uses less digits than its factorization.

16159991291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425238.

The product of its digits is 393660, while the sum is 53.

The spelling of 16159991291 in words is "sixteen billion, one hundred fifty-nine million, nine hundred ninety-one thousand, two hundred ninety-one".