16172357872 has 80 divisors (see below), whose sum is σ = 34471008000. Its totient is φ = 7289285120.

The previous prime is 16172357867. The next prime is 16172357879. The reversal of 16172357872 is 27875327161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16172357879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18870468 + ... + 18871324.

It is an arithmetic number, because the mean of its divisors is an integer number (430887600).

Almost surely, 2^16172357872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16172357872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17235504000).

16172357872 is an abundant number, since it is smaller than the sum of its proper divisors (18298650128).

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

16172357872 is a wasteful number, since it uses less digits than its factorization.

16172357872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 1648 counting only the distinct ones).

The product of its digits is 987840, while the sum is 49.

The spelling of 16172357872 in words is "sixteen billion, one hundred seventy-two million, three hundred fifty-seven thousand, eight hundred seventy-two".