171956269040 has 20 divisors (see below), whose sum is σ = 399798325704. Its totient is φ = 68782507584.

The previous prime is 171956269027. The next prime is 171956269061. The reversal of 171956269040 is 40962659171.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 171956269040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074726602 + ... + 1074726761.

Almost surely, 2^171956269040 is an apocalyptic number.

171956269040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171956269040 is an abundant number, since it is smaller than the sum of its proper divisors (227842056664).

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

171956269040 is a wasteful number, since it uses less digits than its factorization.

171956269040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149453376 (or 2149453370 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 171956269040 in words is "one hundred seventy-one billion, nine hundred fifty-six million, two hundred sixty-nine thousand, forty".