172171404431440 has 80 divisors (see below), whose sum is σ = 401894862082560. Its totient is φ = 68594108659200.

The previous prime is 172171404431363. The next prime is 172171404431461. The reversal of 172171404431440 is 44134404171271.

It is a tau number, because it is divible by the number of its divisors (80).

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, 57462465 + ... + 60384415.

It is an arithmetic number, because the mean of its divisors is an integer number (5023685776032).

Almost surely, 2^{172171404431440} is an apocalyptic number.

172171404431440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172171404431440 is an abundant number, since it is smaller than the sum of its proper divisors (229723457651120).

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

172171404431440 is a wasteful number, since it uses less digits than its factorization.

172171404431440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924900 (or 2924894 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 172171404431440 in words is "one hundred seventy-two trillion, one hundred seventy-one billion, four hundred four million, four hundred thirty-one thousand, four hundred forty".