164021109425044 has 24 divisors (see below), whose sum is σ = 289176760080936. Its totient is φ = 81400917312000.

The previous prime is 164021109425039. The next prime is 164021109425101. The reversal of 164021109425044 is 440524901120461.

It can be written as a sum of positive squares in 4 ways, for example, as 11032362250000 + 152988747175044 = 3321500^2 + 12368862^2 .

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, 217039777 + ... + 217794184.

It is an arithmetic number, because the mean of its divisors is an integer number (12049031670039).

Almost surely, 2^{164021109425044} is an apocalyptic number.

It is an amenable number.

164021109425044 is a deficient number, since it is larger than the sum of its proper divisors (125155650655892).

164021109425044 is a wasteful number, since it uses less digits than its factorization.

164021109425044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434834667 (or 434834665 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 164021109425044 in words is "one hundred sixty-four trillion, twenty-one billion, one hundred nine million, four hundred twenty-five thousand, forty-four".