16089173857 has 4 divisors (see below), whose sum is σ = 16092169236. Its totient is φ = 16086178480.

The previous prime is 16089173843. The next prime is 16089173861. The reversal of 16089173857 is 75837198061.

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 8071045921 + 8018127936 = 89839^2 + 89544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16089173857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16089173798 and 16089173807.

It is not an unprimeable number, because it can be changed into a prime (16089173827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489618 + ... + 1500379.

It is an arithmetic number, because the mean of its divisors is an integer number (4023042309).

Almost surely, 2^16089173857 is an apocalyptic number.

It is an amenable number.

16089173857 is a deficient number, since it is larger than the sum of its proper divisors (2995379).

16089173857 is an equidigital number, since it uses as much as digits as its factorization.

16089173857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995378.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 16089173857 in words is "sixteen billion, eighty-nine million, one hundred seventy-three thousand, eight hundred fifty-seven".