171926842440 has 128 divisors (see below), whose sum is σ = 521334144000. Its totient is φ = 45354716928.

The previous prime is 171926842427. The next prime is 171926842463. The reversal of 171926842440 is 44248629171.

171926842440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 171926842440.

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, 9479701 + ... + 9497819.

It is an arithmetic number, because the mean of its divisors is an integer number (4072923000).

Almost surely, 2^171926842440 is an apocalyptic number.

171926842440 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 171926842440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260667072000).

171926842440 is an abundant number, since it is smaller than the sum of its proper divisors (349407301560).

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

171926842440 is a wasteful number, since it uses less digits than its factorization.

171926842440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18979 (or 18975 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 171926842440 in words is "one hundred seventy-one billion, nine hundred twenty-six million, eight hundred forty-two thousand, four hundred forty".