194128806486 has 144 divisors (see below), whose sum is σ = 429043060800. Its totient is φ = 58528833792.

The previous prime is 194128806467. The next prime is 194128806497. The reversal of 194128806486 is 684608821491.

It is a happy number.

194128806486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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 71 ways as a sum of consecutive naturals, for example, 225993525 + ... + 225994383.

It is an arithmetic number, because the mean of its divisors is an integer number (2979465700).

Almost surely, 2^194128806486 is an apocalyptic number.

194128806486 is an abundant number, since it is smaller than the sum of its proper divisors (234914254314).

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

194128806486 is a wasteful number, since it uses less digits than its factorization.

194128806486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 57.

The spelling of 194128806486 in words is "one hundred ninety-four billion, one hundred twenty-eight million, eight hundred six thousand, four hundred eighty-six".