161710204473 has 24 divisors (see below), whose sum is σ = 247585659048. Its totient is φ = 101356849152.

The previous prime is 161710204399. The next prime is 161710204477. The reversal of 161710204473 is 374402017161.

161710204473 is a `hidden beast` number, since 1 + 617 + 10 + 20 + 4 + 4 + 7 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8557730064 + 153152474409 = 92508^2 + 391347^2 .

It is not a de Polignac number, because 161710204473 - 2⁸ = 161710204217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161710204477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420636 + ... + 707357.

It is an arithmetic number, because the mean of its divisors is an integer number (10316069127).

Almost surely, 2^161710204473 is an apocalyptic number.

It is an amenable number.

161710204473 is a deficient number, since it is larger than the sum of its proper divisors (85875454575).

161710204473 is a wasteful number, since it uses less digits than its factorization.

161710204473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128953 (or 1128950 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 161710204473 in words is "one hundred sixty-one billion, seven hundred ten million, two hundred four thousand, four hundred seventy-three".