164011609969 has 2 divisors, whose sum is σ = 164011609970. Its totient is φ = 164011609968.

The previous prime is 164011609889. The next prime is 164011610017. The reversal of 164011609969 is 969906110461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141597927025 + 22413682944 = 376295^2 + 149712^2 .

It is a cyclic number.

It is not a de Polignac number, because 164011609969 - 2²⁵ = 163978055537 is a prime.

It is a super-2 number, since 2×164011609969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164011609369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82005804984 + 82005804985.

It is an arithmetic number, because the mean of its divisors is an integer number (82005804985).

Almost surely, 2^164011609969 is an apocalyptic number.

It is an amenable number.

164011609969 is a deficient number, since it is larger than the sum of its proper divisors (1).

164011609969 is an equidigital number, since it uses as much as digits as its factorization.

164011609969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 164011609969 in words is "one hundred sixty-four billion, eleven million, six hundred nine thousand, nine hundred sixty-nine".