164516989897 has 24 divisors (see below), whose sum is σ = 183805200000. Its totient is φ = 147109854528.

The previous prime is 164516989883. The next prime is 164516989939. The reversal of 164516989897 is 798989615461.

It is not a de Polignac number, because 164516989897 - 2¹⁹ = 164516465609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164516987897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 591354 + ... + 823852.

It is an arithmetic number, because the mean of its divisors is an integer number (7658550000).

Almost surely, 2^164516989897 is an apocalyptic number.

It is an amenable number.

164516989897 is a deficient number, since it is larger than the sum of its proper divisors (19288210103).

164516989897 is a wasteful number, since it uses less digits than its factorization.

164516989897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232657 (or 232644 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 73.

The spelling of 164516989897 in words is "one hundred sixty-four billion, five hundred sixteen million, nine hundred eighty-nine thousand, eight hundred ninety-seven".