172688443066137 has 4 divisors (see below), whose sum is σ = 230251257421520. Its totient is φ = 115125628710756.

The previous prime is 172688443066129. The next prime is 172688443066177. The reversal of 172688443066137 is 731660344886271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 172688443066137 - 2³ = 172688443066129 is a prime.

It is a super-2 number, since 2×172688443066137² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172688443066177) 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 3 ways as a sum of consecutive naturals, for example, 28781407177687 + ... + 28781407177692.

It is an arithmetic number, because the mean of its divisors is an integer number (57562814355380).

Almost surely, 2^{172688443066137} is an apocalyptic number.

It is an amenable number.

172688443066137 is a deficient number, since it is larger than the sum of its proper divisors (57562814355383).

172688443066137 is an equidigital number, since it uses as much as digits as its factorization.

172688443066137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57562814355382.

The product of its (nonzero) digits is 195084288, while the sum is 66.

The spelling of 172688443066137 in words is "one hundred seventy-two trillion, six hundred eighty-eight billion, four hundred forty-three million, sixty-six thousand, one hundred thirty-seven".