16944186157 has 4 divisors (see below), whose sum is σ = 17016908220. Its totient is φ = 16871464096.

The previous prime is 16944186137. The next prime is 16944186173. The reversal of 16944186157 is 75168144961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12093620841 + 4850565316 = 109971^2 + 69646^2 .

It is a cyclic number.

It is not a de Polignac number, because 16944186157 - 2¹¹ = 16944184109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16944186137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36360682 + ... + 36361147.

It is an arithmetic number, because the mean of its divisors is an integer number (4254227055).

Almost surely, 2^16944186157 is an apocalyptic number.

It is an amenable number.

16944186157 is a deficient number, since it is larger than the sum of its proper divisors (72722063).

16944186157 is an equidigital number, since it uses as much as digits as its factorization.

16944186157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72722062.

The product of its digits is 1451520, while the sum is 52.

The spelling of 16944186157 in words is "sixteen billion, nine hundred forty-four million, one hundred eighty-six thousand, one hundred fifty-seven".