16723126929664 has 27 divisors (see below), whose sum is σ = 33381059750227. Its totient is φ = 8361530749696.

The previous prime is 16723126929653. The next prime is 16723126929667. The reversal of 16723126929664 is 46692962132761.

The square root of 16723126929664 is 4089392.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16723126929596 and 16723126929605.

It is not an unprimeable number, because it can be changed into a prime (16723126929667) 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, 65302479 + ... + 65558065.

Almost surely, 2^{16723126929664} is an apocalyptic number.

16723126929664 is the 4089392-nd square number.

It is an amenable number.

16723126929664 is a deficient number, since it is larger than the sum of its proper divisors (16657932820563).

16723126929664 is an frugal number, since it uses more digits than its factorization.

16723126929664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511190 (or 255589 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 64.

16723126929664 divided by its sum of digits (64) gives a square (261298858276 = 511174²).

The spelling of 16723126929664 in words is "sixteen trillion, seven hundred twenty-three billion, one hundred twenty-six million, nine hundred twenty-nine thousand, six hundred sixty-four".