164021109425045 has 6 divisors (see below), whose sum is σ = 196825365675042. Its totient is φ = 131216864630048.

The previous prime is 164021109425039. The next prime is 164021109425101. The reversal of 164021109425045 is 540524901120461.

It is a happy number.

164021109425045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 9939756896644 + 154081352528401 = 3152738^2 + 12412951^2 .

It is not a de Polignac number, because 164021109425045 - 2¹⁸ = 164021109162901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164021109424987 and 164021109425005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25773737 + ... + 31501233.

It is an arithmetic number, because the mean of its divisors is an integer number (32804227612507).

Almost surely, 2^{164021109425045} is an apocalyptic number.

It is an amenable number.

164021109425045 is a deficient number, since it is larger than the sum of its proper divisors (32804256249997).

164021109425045 is an frugal number, since it uses more digits than its factorization.

164021109425045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11454999 (or 5727502 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 164021109425045 in words is "one hundred sixty-four trillion, twenty-one billion, one hundred nine million, four hundred twenty-five thousand, forty-five".