16040123389 has 4 divisors (see below), whose sum is σ = 16055834620. Its totient is φ = 16024412160.

The previous prime is 16040123383. The next prime is 16040123419. The reversal of 16040123389 is 98332104061.

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 5581584100 + 10458539289 = 74710^2 + 102267^2 .

It is a cyclic number.

It is not a de Polignac number, because 16040123389 - 2⁵ = 16040123357 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 (16040123383) 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, 7854084 + ... + 7856125.

It is an arithmetic number, because the mean of its divisors is an integer number (4013958655).

Almost surely, 2^16040123389 is an apocalyptic number.

It is an amenable number.

16040123389 is a deficient number, since it is larger than the sum of its proper divisors (15711231).

16040123389 is a wasteful number, since it uses less digits than its factorization.

16040123389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711230.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 16040123389 in words is "sixteen billion, forty million, one hundred twenty-three thousand, three hundred eighty-nine".