164420622036644 has 6 divisors (see below), whose sum is σ = 287736088564134. Its totient is φ = 82210311018320.

The previous prime is 164420622036617. The next prime is 164420622036673. The reversal of 164420622036644 is 446630226024461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 99613613958244 + 64807008078400 = 9980662^2 + 8050280^2 .

It is a super-3 number, since 3×164420622036644³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164420622036592 and 164420622036601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20552577754577 + ... + 20552577754584.

It is an arithmetic number, because the mean of its divisors is an integer number (47956014760689).

Almost surely, 2^{164420622036644} is an apocalyptic number.

It is an amenable number.

164420622036644 is a deficient number, since it is larger than the sum of its proper divisors (123315466527490).

164420622036644 is a wasteful number, since it uses less digits than its factorization.

164420622036644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41105155509165 (or 41105155509163 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 164420622036644 in words is "one hundred sixty-four trillion, four hundred twenty billion, six hundred twenty-two million, thirty-six thousand, six hundred forty-four".