16454988729 has 21 divisors (see below), whose sum is σ = 24676391029. Its totient is φ = 10967683500.

The previous prime is 16454988689. The next prime is 16454988733. The reversal of 16454988729 is 92788945461.

The square root of 16454988729 is 128277.

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

16454988729 is a `hidden beast` number, since 1 + 6 + 4 + 549 + 8 + 87 + 2 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-16454988729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16454988769) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 3461104 + ... + 3465854.

Almost surely, 2^16454988729 is an apocalyptic number.

16454988729 is the 128277-th square number.

16454988729 is the 64139-th centered octagonal number.

It is an amenable number.

16454988729 is a deficient number, since it is larger than the sum of its proper divisors (8221402300).

16454988729 is an frugal number, since it uses more digits than its factorization.

16454988729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520 (or 4754 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 16454988729 in words is "sixteen billion, four hundred fifty-four million, nine hundred eighty-eight thousand, seven hundred twenty-nine".