164121565141 has 2 divisors, whose sum is σ = 164121565142. Its totient is φ = 164121565140.

The previous prime is 164121565099. The next prime is 164121565159. The reversal of 164121565141 is 141565121461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148483062225 + 15638502916 = 385335^2 + 125054^2 .

It is a cyclic number.

It is not a de Polignac number, because 164121565141 - 2¹⁵ = 164121532373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164121565141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164121568141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82060782570 + 82060782571.

It is an arithmetic number, because the mean of its divisors is an integer number (82060782571).

Almost surely, 2^164121565141 is an apocalyptic number.

It is an amenable number.

164121565141 is a deficient number, since it is larger than the sum of its proper divisors (1).

164121565141 is an equidigital number, since it uses as much as digits as its factorization.

164121565141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The spelling of 164121565141 in words is "one hundred sixty-four billion, one hundred twenty-one million, five hundred sixty-five thousand, one hundred forty-one".