171553363355172 has 48 divisors (see below), whose sum is σ = 401853857150592. Its totient is φ = 56961259027200.

The previous prime is 171553363355167. The next prime is 171553363355177. The reversal of 171553363355172 is 271553363355171.

It is an interprime number because it is at equal distance from previous prime (171553363355167) and next prime (171553363355177).

It is not an unprimeable number, because it can be changed into a prime (171553363355177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28502488 + ... + 33992624.

It is an arithmetic number, because the mean of its divisors is an integer number (8371955357304).

Almost surely, 2^{171553363355172} is an apocalyptic number.

171553363355172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

171553363355172 is an abundant number, since it is smaller than the sum of its proper divisors (230300493795420).

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

171553363355172 is a wasteful number, since it uses less digits than its factorization.

171553363355172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500308 (or 5500306 counting only the distinct ones).

The product of its digits is 29767500, while the sum is 57.

Subtracting 171553363355172 from its reverse (271553363355171), we obtain a palindrome (99999999999999).

The spelling of 171553363355172 in words is "one hundred seventy-one trillion, five hundred fifty-three billion, three hundred sixty-three million, three hundred fifty-five thousand, one hundred seventy-two".