171662209680 has 480 divisors, whose sum is σ = 623231967744. Its totient is φ = 38916194304.

The previous prime is 171662209669. The next prime is 171662209709. The reversal of 171662209680 is 86902266171.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32404792 + ... + 32410088.

Almost surely, 2^171662209680 is an apocalyptic number.

171662209680 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 171662209680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311615983872).

171662209680 is an abundant number, since it is smaller than the sum of its proper divisors (451569758064).

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

171662209680 is a wasteful number, since it uses less digits than its factorization.

171662209680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5403 (or 5384 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 171662209680 in words is "one hundred seventy-one billion, six hundred sixty-two million, two hundred nine thousand, six hundred eighty".