194864868128 has 192 divisors, whose sum is σ = 465285316608. Its totient is φ = 78575477760.

The previous prime is 194864868127. The next prime is 194864868131. The reversal of 194864868128 is 821868468491.

It is not an unprimeable number, because it can be changed into a prime (194864868127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51237875 + ... + 51241677.

It is an arithmetic number, because the mean of its divisors is an integer number (2423361024).

Almost surely, 2^194864868128 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 194864868128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232642658304).

194864868128 is an abundant number, since it is smaller than the sum of its proper divisors (270420448480).

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

194864868128 is a wasteful number, since it uses less digits than its factorization.

194864868128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055 (or 4047 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 65.

The spelling of 194864868128 in words is "one hundred ninety-four billion, eight hundred sixty-four million, eight hundred sixty-eight thousand, one hundred twenty-eight".