172767312081 has 96 divisors (see below), whose sum is σ = 322781338880. Its totient is φ = 86604360192.

The previous prime is 172767312077. The next prime is 172767312083. The reversal of 172767312081 is 180213767271.

It is not a de Polignac number, because 172767312081 - 2² = 172767312077 is a prime.

It is a super-2 number, since 2×172767312081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172767312083) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1236735 + ... + 1369323.

Almost surely, 2^172767312081 is an apocalyptic number.

It is an amenable number.

172767312081 is a deficient number, since it is larger than the sum of its proper divisors (150014026799).

172767312081 is a wasteful number, since it uses less digits than its factorization.

172767312081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132695 (or 132692 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 172767312081 in words is "one hundred seventy-two billion, seven hundred sixty-seven million, three hundred twelve thousand, eighty-one".