16269614340721 has 9 divisors (see below), whose sum is σ = 18925910751321. Its totient is φ = 13945359519252.

The previous prime is 16269614340677. The next prime is 16269614340731. The reversal of 16269614340721 is 12704341696261.

The square root of 16269614340721 is 4033561.

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

It is a de Polignac number, because none of the positive numbers 2^k-16269614340721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16269614340731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27946816 + ... + 28523038.

It is an arithmetic number, because the mean of its divisors is an integer number (2102878972369).

Almost surely, 2^{16269614340721} is an apocalyptic number.

16269614340721 is the 4033561-st square number.

16269614340721 is the 2016781-st centered octagonal number.

It is an amenable number.

16269614340721 is a deficient number, since it is larger than the sum of its proper divisors (2656296410600).

16269614340721 is an frugal number, since it uses more digits than its factorization.

16269614340721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152460 (or 576230 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 16269614340721 in words is "sixteen trillion, two hundred sixty-nine billion, six hundred fourteen million, three hundred forty thousand, seven hundred twenty-one".