164989507918 has 16 divisors (see below), whose sum is σ = 258963816960. Its totient is φ = 78688218136.

The previous prime is 164989507889. The next prime is 164989507919. The reversal of 164989507918 is 819705989461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164989507919) 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, 4978930 + ... + 5011957.

It is an arithmetic number, because the mean of its divisors is an integer number (16185238560).

Almost surely, 2^164989507918 is an apocalyptic number.

164989507918 is a deficient number, since it is larger than the sum of its proper divisors (93974309042).

164989507918 is a wasteful number, since it uses less digits than its factorization.

164989507918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991271.

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 164989507918 in words is "one hundred sixty-four billion, nine hundred eighty-nine million, five hundred seven thousand, nine hundred eighteen".