172665235442071 has 8 divisors (see below), whose sum is σ = 172762665084288. Its totient is φ = 172567809219000.

The previous prime is 172665235441997. The next prime is 172665235442129. The reversal of 172665235442071 is 170244532566271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172665235442071 is a prime.

It is a super-2 number, since 2×172665235442071² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172665235442671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103781556 + ... + 105432166.

It is an arithmetic number, because the mean of its divisors is an integer number (21595333135536).

Almost surely, 2^{172665235442071} is an apocalyptic number.

172665235442071 is a deficient number, since it is larger than the sum of its proper divisors (97429642217).

172665235442071 is a wasteful number, since it uses less digits than its factorization.

172665235442071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709573.

The product of its (nonzero) digits is 16934400, while the sum is 55.

The spelling of 172665235442071 in words is "one hundred seventy-two trillion, six hundred sixty-five billion, two hundred thirty-five million, four hundred forty-two thousand, seventy-one".