171661128 has 16 divisors (see below), whose sum is σ = 429152880. Its totient is φ = 57220368.

The previous prime is 171661111. The next prime is 171661141. The reversal of 171661128 is 821166171.

It is a happy number.

171661128 is digitally balanced in base 2, 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 3 ways as a sum of consecutive naturals, for example, 3576250 + ... + 3576297.

It is an arithmetic number, because the mean of its divisors is an integer number (26822055).

Almost surely, 2^171661128 is an apocalyptic number.

It is an amenable number.

171661128 is an abundant number, since it is smaller than the sum of its proper divisors (257491752).

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

171661128 is a wasteful number, since it uses less digits than its factorization.

171661128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7152556 (or 7152552 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 171661128 is about 13101.9513050538. The cubic root of 171661128 is about 555.7643101593.

The spelling of 171661128 in words is "one hundred seventy-one million, six hundred sixty-one thousand, one hundred twenty-eight".