172168647816 has 32 divisors (see below), whose sum is σ = 469550858400. Its totient is φ = 52172317440.

The previous prime is 172168647779. The next prime is 172168647817. The reversal of 172168647816 is 618746861271.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (172168647817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326076721 + ... + 326077248.

It is an arithmetic number, because the mean of its divisors is an integer number (14673464325).

Almost surely, 2^172168647816 is an apocalyptic number.

It is an amenable number.

172168647816 is an abundant number, since it is smaller than the sum of its proper divisors (297382210584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172168647816 is a wasteful number, since it uses less digits than its factorization.

172168647816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652153989 (or 652153985 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The spelling of 172168647816 in words is "one hundred seventy-two billion, one hundred sixty-eight million, six hundred forty-seven thousand, eight hundred sixteen".