164383575644 has 24 divisors (see below), whose sum is σ = 289225969200. Its totient is φ = 81748512000.

The previous prime is 164383575607. The next prime is 164383575661. The reversal of 164383575644 is 446575383461.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 164383575644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596372 + ... + 827300.

It is an arithmetic number, because the mean of its divisors is an integer number (12051082050).

Almost surely, 2^164383575644 is an apocalyptic number.

It is an amenable number.

164383575644 is a deficient number, since it is larger than the sum of its proper divisors (124842393556).

164383575644 is a wasteful number, since it uses less digits than its factorization.

164383575644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231893 (or 231891 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 56.

The spelling of 164383575644 in words is "one hundred sixty-four billion, three hundred eighty-three million, five hundred seventy-five thousand, six hundred forty-four".