171977748804 has 45 divisors (see below), whose sum is σ = 449603321167. Its totient is φ = 57323428056.

The previous prime is 171977748643. The next prime is 171977748809. The reversal of 171977748804 is 408847779171.

The square root of 171977748804 is 414702.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171977748809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7453117 + ... + 7476155.

Almost surely, 2^171977748804 is an apocalyptic number.

171977748804 is the 414702-nd square number.

It is an amenable number.

171977748804 is an abundant number, since it is smaller than the sum of its proper divisors (277625572363).

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

171977748804 is an frugal number, since it uses more digits than its factorization.

171977748804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46094 (or 23044 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 63.

The spelling of 171977748804 in words is "one hundred seventy-one billion, nine hundred seventy-seven million, seven hundred forty-eight thousand, eight hundred four".