164238969336881 has 2 divisors, whose sum is σ = 164238969336882. Its totient is φ = 164238969336880.

The previous prime is 164238969336847. The next prime is 164238969336931. The reversal of 164238969336881 is 188633969832461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109984195402225 + 54254773934656 = 10487335^2 + 7365784^2 .

It is a cyclic number.

It is not a de Polignac number, because 164238969336881 - 2⁶ = 164238969336817 is a prime.

It is a super-2 number, since 2×164238969336881² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164238969336811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82119484668440 + 82119484668441.

It is an arithmetic number, because the mean of its divisors is an integer number (82119484668441).

Almost surely, 2^{164238969336881} is an apocalyptic number.

It is an amenable number.

164238969336881 is a deficient number, since it is larger than the sum of its proper divisors (1).

164238969336881 is an equidigital number, since it uses as much as digits as its factorization.

164238969336881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1934917632, while the sum is 77.

The spelling of 164238969336881 in words is "one hundred sixty-four trillion, two hundred thirty-eight billion, nine hundred sixty-nine million, three hundred thirty-six thousand, eight hundred eighty-one".