171555507240 has 64 divisors (see below), whose sum is σ = 554256259200. Its totient is φ = 42229047552.

The previous prime is 171555507223. The next prime is 171555507271. The reversal of 171555507240 is 42705555171.

It is a junction number, because it is equal to n+sod(n) for n = 171555507192 and 171555507201.

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, 54984180 + ... + 54987299.

It is an arithmetic number, because the mean of its divisors is an integer number (8660254050).

Almost surely, 2^171555507240 is an apocalyptic number.

171555507240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171555507240 is an abundant number, since it is smaller than the sum of its proper divisors (382700751960).

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

171555507240 is a wasteful number, since it uses less digits than its factorization.

171555507240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109971506 (or 109971502 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 42.

The spelling of 171555507240 in words is "one hundred seventy-one billion, five hundred fifty-five million, five hundred seven thousand, two hundred forty".