16248469221721 has 27 divisors (see below), whose sum is σ = 18170653854549. Its totient is φ = 14518636090200.

The previous prime is 16248469221697. The next prime is 16248469221731. The reversal of 16248469221721 is 12712296484261.

The square root of 16248469221721 is 4030939.

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

16248469221721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16248469221721 - 2⁹ = 16248469221209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16248469221731) 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, 2616076306 + ... + 2616082516.

Almost surely, 2^{16248469221721} is an apocalyptic number.

16248469221721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16248469221721 is the 4030939-th square number.

16248469221721 is the 2015470-th centered octagonal number.

It is an amenable number.

16248469221721 is a deficient number, since it is larger than the sum of its proper divisors (1922184632828).

16248469221721 is an frugal number, since it uses more digits than its factorization.

16248469221721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12562 (or 6281 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The spelling of 16248469221721 in words is "sixteen trillion, two hundred forty-eight billion, four hundred sixty-nine million, two hundred twenty-one thousand, seven hundred twenty-one".