64194871191838 has 16 divisors (see below), whose sum is σ = 98212978905696. Its totient is φ = 31462437875680.

The previous prime is 64194871191817. The next prime is 64194871191889. The reversal of 64194871191838 is 83819117849146.

64194871191838 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306555081 + ... + 1306604212.

It is an arithmetic number, because the mean of its divisors is an integer number (6138311181606).

Almost surely, 2^{64194871191838} is an apocalyptic number.

64194871191838 is a deficient number, since it is larger than the sum of its proper divisors (34018107713858).

64194871191838 is a wasteful number, since it uses less digits than its factorization.

64194871191838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613159539.

The product of its digits is 83607552, while the sum is 70.

The spelling of 64194871191838 in words is "sixty-four trillion, one hundred ninety-four billion, eight hundred seventy-one million, one hundred ninety-one thousand, eight hundred thirty-eight".