161771043008 has 28 divisors (see below), whose sum is σ = 321086055312. Its totient is φ = 80867470080.

The previous prime is 161771042921. The next prime is 161771043017. The reversal of 161771043008 is 800340177161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9293 + ... + 568883.

Almost surely, 2^161771043008 is an apocalyptic number.

It is an amenable number.

161771043008 is a deficient number, since it is larger than the sum of its proper divisors (159315012304).

161771043008 is an equidigital number, since it uses as much as digits as its factorization.

161771043008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564120 (or 564110 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 161771043008 in words is "one hundred sixty-one billion, seven hundred seventy-one million, forty-three thousand, eight".