32128108643994 has 128 divisors (see below), whose sum is σ = 74265852810240. Its totient is φ = 9163627200000.

The previous prime is 32128108643977. The next prime is 32128108644059. The reversal of 32128108643994 is 49934680182123.

It is a happy number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 238482334 + ... + 238617014.

It is an arithmetic number, because the mean of its divisors is an integer number (580201975080).

Almost surely, 2^{32128108643994} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32128108643994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37132926405120).

32128108643994 is an abundant number, since it is smaller than the sum of its proper divisors (42137744166246).

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

32128108643994 is a wasteful number, since it uses less digits than its factorization.

32128108643994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135948.

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 32128108643994 in words is "thirty-two trillion, one hundred twenty-eight billion, one hundred eight million, six hundred forty-three thousand, nine hundred ninety-four".