16610312161 has 5 divisors (see below), whose sum is σ = 16656709681. Its totient is φ = 16564043882.

The previous prime is 16610312143. The next prime is 16610312167. The reversal of 16610312161 is 16121301661.

The square root of 16610312161 is 128881.

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

It is not a de Polignac number, because 16610312161 - 2⁵ = 16610312129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16610312167) by changing a digit.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 46268100 + ... + 46268458.

Almost surely, 2^16610312161 is an apocalyptic number.

16610312161 is the 128881-st square number.

16610312161 is the 64441-st centered octagonal number.

It is an amenable number.

16610312161 is a deficient number, since it is larger than the sum of its proper divisors (46397520).

16610312161 is an frugal number, since it uses more digits than its factorization.

16610312161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

Multiplying 16610312161 by its product of nonzero digits (1296), we get a 4-th power (21526964560656 = 2154⁴).

The spelling of 16610312161 in words is "sixteen billion, six hundred ten million, three hundred twelve thousand, one hundred sixty-one".