16573215169 has 27 divisors (see below), whose sum is σ = 19706455587. Its totient is φ = 13897416624.

The previous prime is 16573215163. The next prime is 16573215181. The reversal of 16573215169 is 96151237561.

The square root of 16573215169 is 128737.

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

It can be written as a sum of positive squares in only one way, i.e., 11947583025 + 4625632144 = 109305^2 + 68012^2 .

It is not a de Polignac number, because 16573215169 - 2⁹ = 16573214657 is a prime.

It is a super-2 number, since 2×16573215169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16573215163) 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, 47761254 + ... + 47761600.

Almost surely, 2^16573215169 is an apocalyptic number.

16573215169 is the 128737-th square number.

16573215169 is the 64369-th centered octagonal number.

It is an amenable number.

16573215169 is a deficient number, since it is larger than the sum of its proper divisors (3133240418).

16573215169 is an frugal number, since it uses more digits than its factorization.

16573215169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 407 counting only the distinct ones).

The product of its digits is 340200, while the sum is 46.

It can be divided in two parts, 165732 and 15169, that added together give a triangular number (180901 = T₆₀₁).

The spelling of 16573215169 in words is "sixteen billion, five hundred seventy-three million, two hundred fifteen thousand, one hundred sixty-nine".