171442427128 has 64 divisors (see below), whose sum is σ = 387215640000. Its totient is φ = 69603136512.

The previous prime is 171442427077. The next prime is 171442427137. The reversal of 171442427128 is 821724244171.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909853 + ... + 1081996.

It is an arithmetic number, because the mean of its divisors is an integer number (6050244375).

Almost surely, 2^171442427128 is an apocalyptic number.

It is an amenable number.

171442427128 is an abundant number, since it is smaller than the sum of its proper divisors (215773212872).

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

171442427128 is a wasteful number, since it uses less digits than its factorization.

171442427128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991944 (or 1991940 counting only the distinct ones).

The product of its digits is 200704, while the sum is 43.

The spelling of 171442427128 in words is "one hundred seventy-one billion, four hundred forty-two million, four hundred twenty-seven thousand, one hundred twenty-eight".