164121917164 has 6 divisors (see below), whose sum is σ = 287213355044. Its totient is φ = 82060958580.

The previous prime is 164121917161. The next prime is 164121917207. The reversal of 164121917164 is 461719121461.

It is a self number, because there is not a number n which added to its sum of digits gives 164121917164.

It is not an unprimeable number, because it can be changed into a prime (164121917161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20515239642 + ... + 20515239649.

Almost surely, 2^164121917164 is an apocalyptic number.

It is an amenable number.

164121917164 is a deficient number, since it is larger than the sum of its proper divisors (123091437880).

164121917164 is a wasteful number, since it uses less digits than its factorization.

164121917164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41030479295 (or 41030479293 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The spelling of 164121917164 in words is "one hundred sixty-four billion, one hundred twenty-one million, nine hundred seventeen thousand, one hundred sixty-four".