172111761423 has 96 divisors (see below), whose sum is σ = 292265625600. Its totient is φ = 97557808320.

The previous prime is 172111761407. The next prime is 172111761461. The reversal of 172111761423 is 324167111271.

172111761423 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 1 + 17 + 614 + 23 = 666.

It is not a de Polignac number, because 172111761423 - 2⁴ = 172111761407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172111761463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 368547436 + ... + 368547902.

It is an arithmetic number, because the mean of its divisors is an integer number (3044433600).

Almost surely, 2^172111761423 is an apocalyptic number.

172111761423 is a deficient number, since it is larger than the sum of its proper divisors (120153864177).

172111761423 is a wasteful number, since it uses less digits than its factorization.

172111761423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202 (or 1185 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

Adding to 172111761423 its reverse (324167111271), we get a palindrome (496278872694).

The spelling of 172111761423 in words is "one hundred seventy-two billion, one hundred eleven million, seven hundred sixty-one thousand, four hundred twenty-three".