16549187389 has 8 divisors (see below), whose sum is σ = 19353202880. Its totient is φ = 13855133376.

The previous prime is 16549187371. The next prime is 16549187453. The reversal of 16549187389 is 98378194561.

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

It is not a de Polignac number, because 16549187389 - 2¹⁵ = 16549154621 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 (16549187989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27490044 + ... + 27490645.

It is an arithmetic number, because the mean of its divisors is an integer number (2419150360).

Almost surely, 2^16549187389 is an apocalyptic number.

It is an amenable number.

16549187389 is a deficient number, since it is larger than the sum of its proper divisors (2804015491).

16549187389 is an equidigital number, since it uses as much as digits as its factorization.

16549187389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54980739.

The product of its digits is 13063680, while the sum is 61.

The spelling of 16549187389 in words is "sixteen billion, five hundred forty-nine million, one hundred eighty-seven thousand, three hundred eighty-nine".