164730925861 has 2 divisors, whose sum is σ = 164730925862. Its totient is φ = 164730925860.

The previous prime is 164730925811. The next prime is 164730925867. The reversal of 164730925861 is 168529037461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104568156900 + 60162768961 = 323370^2 + 245281^2 .

It is an emirp because it is prime and its reverse (168529037461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164730925861 - 2²⁹ = 164194054949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164730925799 and 164730925808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164730925867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82365462930 + 82365462931.

It is an arithmetic number, because the mean of its divisors is an integer number (82365462931).

It is a 1-persistent number, because it is pandigital, but 2⋅164730925861 = 329461851722 is not.

Almost surely, 2^164730925861 is an apocalyptic number.

It is an amenable number.

164730925861 is a deficient number, since it is larger than the sum of its proper divisors (1).

164730925861 is an equidigital number, since it uses as much as digits as its factorization.

164730925861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 164730925861 in words is "one hundred sixty-four billion, seven hundred thirty million, nine hundred twenty-five thousand, eight hundred sixty-one".