161916575080 has 128 divisors (see below), whose sum is σ = 395221317120. Its totient is φ = 59346109440.

The previous prime is 161916575077. The next prime is 161916575099. The reversal of 161916575080 is 80575619161.

It is a happy number.

161916575080 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88429765 + ... + 88431595.

It is an arithmetic number, because the mean of its divisors is an integer number (3087666540).

Almost surely, 2^161916575080 is an apocalyptic number.

161916575080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161916575080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197610658560).

161916575080 is an abundant number, since it is smaller than the sum of its proper divisors (233304742040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161916575080 is a wasteful number, since it uses less digits than its factorization.

161916575080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011 (or 3007 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 161916575080 in words is "one hundred sixty-one billion, nine hundred sixteen million, five hundred seventy-five thousand, eighty".