16172147992 has 128 divisors (see below), whose sum is σ = 41172364800. Its totient is φ = 5750553600.

The previous prime is 16172147969. The next prime is 16172147993. The reversal of 16172147992 is 29974127161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16172147993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701367 + ... + 724057.

It is an arithmetic number, because the mean of its divisors is an integer number (321659100).

Almost surely, 2^16172147992 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 16172147992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20586182400).

16172147992 is an abundant number, since it is smaller than the sum of its proper divisors (25000216808).

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

16172147992 is a wasteful number, since it uses less digits than its factorization.

16172147992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22817 (or 22813 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The spelling of 16172147992 in words is "sixteen billion, one hundred seventy-two million, one hundred forty-seven thousand, nine hundred ninety-two".