16404257747089 has 27 divisors (see below), whose sum is σ = 16947324229563. Its totient is φ = 15878470726800.

The previous prime is 16404257747069. The next prime is 16404257747107. The reversal of 16404257747089 is 98074775240461.

The square root of 16404257747089 is 4050217.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 533435954689 + 15870821792400 = 730367^2 + 3983820^2 .

It is not a de Polignac number, because 16404257747089 - 2¹¹ = 16404257745041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16404257747089.

It is not an unprimeable number, because it can be changed into a prime (16404257747029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16553236384 + ... + 16553237374.

It is an arithmetic number, because the mean of its divisors is an integer number (627678675169).

Almost surely, 2^{16404257747089} is an apocalyptic number.

16404257747089 is the 4050217-th square number.

16404257747089 is the 2025109-th centered octagonal number.

It is an amenable number.

16404257747089 is a deficient number, since it is larger than the sum of its proper divisors (543066482474).

16404257747089 is an frugal number, since it uses more digits than its factorization.

16404257747089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 64.

The spelling of 16404257747089 in words is "sixteen trillion, four hundred four billion, two hundred fifty-seven million, seven hundred forty-seven thousand, eighty-nine".