16392449089 has 3 divisors (see below), whose sum is σ = 16392577123. Its totient is φ = 16392321056.

The previous prime is 16392449033. The next prime is 16392449107. The reversal of 16392449089 is 98094429361.

The square root of 16392449089 is 128033.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98094429361 = 31 ⋅3164336431.

It can be written as a sum of positive squares in only one way, i.e., 7592508225 + 8799940864 = 87135^2 + 93808^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16392449089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16392449989) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64017 + ... + 192049.

Almost surely, 2^16392449089 is an apocalyptic number.

16392449089 is the 128033-rd square number.

16392449089 is the 64017-th centered octagonal number.

It is an amenable number.

16392449089 is a deficient number, since it is larger than the sum of its proper divisors (128034).

16392449089 is an frugal number, since it uses more digits than its factorization.

16392449089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256066 (or 128033 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 16392449089 in words is "sixteen billion, three hundred ninety-two million, four hundred forty-nine thousand, eighty-nine".