171638161180253 has 8 divisors (see below), whose sum is σ = 172280097119520. Its totient is φ = 170996253951600.

The previous prime is 171638161180243. The next prime is 171638161180303. The reversal of 171638161180253 is 352081161836171.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171638161180253 - 2¹⁸ = 171638160918109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171638161180195 and 171638161180204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171638161180243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4838678 + ... + 19149128.

It is an arithmetic number, because the mean of its divisors is an integer number (21535012139940).

Almost surely, 2^{171638161180253} is an apocalyptic number.

It is an amenable number.

171638161180253 is a deficient number, since it is larger than the sum of its proper divisors (641935939267).

171638161180253 is a wasteful number, since it uses less digits than its factorization.

171638161180253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14355307.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 171638161180253 in words is "one hundred seventy-one trillion, six hundred thirty-eight billion, one hundred sixty-one million, one hundred eighty thousand, two hundred fifty-three".