164818621616 has 40 divisors (see below), whose sum is σ = 348513099984. Its totient is φ = 74886056960.

The previous prime is 164818621607. The next prime is 164818621619. The reversal of 164818621616 is 616126818461.

It is not an unprimeable number, because it can be changed into a prime (164818621619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225500 + ... + 616836.

Almost surely, 2^164818621616 is an apocalyptic number.

164818621616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164818621616 is an abundant number, since it is smaller than the sum of its proper divisors (183694478368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164818621616 is a wasteful number, since it uses less digits than its factorization.

164818621616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393749 (or 393743 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The spelling of 164818621616 in words is "one hundred sixty-four billion, eight hundred eighteen million, six hundred twenty-one thousand, six hundred sixteen".