164989507889 has 2 divisors, whose sum is σ = 164989507890. Its totient is φ = 164989507888.

The previous prime is 164989507877. The next prime is 164989507919. The reversal of 164989507889 is 988705989461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138675801664 + 26313706225 = 372392^2 + 162215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164989507889 is a prime.

It is a super-3 number, since 3×164989507889³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (164989507829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82494753944 + 82494753945.

It is an arithmetic number, because the mean of its divisors is an integer number (82494753945).

Almost surely, 2^164989507889 is an apocalyptic number.

It is an amenable number.

164989507889 is a deficient number, since it is larger than the sum of its proper divisors (1).

164989507889 is an equidigital number, since it uses as much as digits as its factorization.

164989507889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 74.

The spelling of 164989507889 in words is "one hundred sixty-four billion, nine hundred eighty-nine million, five hundred seven thousand, eight hundred eighty-nine".