172238543616 has 144 divisors (see below), whose sum is σ = 461765060064. Its totient is φ = 56993513472.

The previous prime is 172238543599. The next prime is 172238543627. The reversal of 172238543616 is 616345832271.

It is a super-2 number, since 2×172238543616² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87296806 + ... + 87298778.

It is an arithmetic number, because the mean of its divisors is an integer number (3206701806).

Almost surely, 2^172238543616 is an apocalyptic number.

172238543616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172238543616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230882530032).

172238543616 is an abundant number, since it is smaller than the sum of its proper divisors (289526516448).

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

172238543616 is a wasteful number, since it uses less digits than its factorization.

172238543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766 (or 2752 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The spelling of 172238543616 in words is "one hundred seventy-two billion, two hundred thirty-eight million, five hundred forty-three thousand, six hundred sixteen".