164894632544 has 12 divisors (see below), whose sum is σ = 324636307884. Its totient is φ = 82447316256.

The previous prime is 164894632537. The next prime is 164894632547. The reversal of 164894632544 is 445236498461.

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 164894632544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164894632547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2576478602 + ... + 2576478665.

It is an arithmetic number, because the mean of its divisors is an integer number (27053025657).

Almost surely, 2^164894632544 is an apocalyptic number.

It is an amenable number.

164894632544 is a deficient number, since it is larger than the sum of its proper divisors (159741675340).

164894632544 is an equidigital number, since it uses as much as digits as its factorization.

164894632544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152957277 (or 5152957269 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 56.

The spelling of 164894632544 in words is "one hundred sixty-four billion, eight hundred ninety-four million, six hundred thirty-two thousand, five hundred forty-four".