164345522261 has 2 divisors, whose sum is σ = 164345522262. Its totient is φ = 164345522260.

The previous prime is 164345522249. The next prime is 164345522273. The reversal of 164345522261 is 162225543461.

It is a balanced prime because it is at equal distance from previous prime (164345522249) and next prime (164345522273).

It can be written as a sum of positive squares in only one way, i.e., 92799436900 + 71546085361 = 304630^2 + 267481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164345522261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166345522261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82172761130 + 82172761131.

It is an arithmetic number, because the mean of its divisors is an integer number (82172761131).

Almost surely, 2^164345522261 is an apocalyptic number.

It is an amenable number.

164345522261 is a deficient number, since it is larger than the sum of its proper divisors (1).

164345522261 is an equidigital number, since it uses as much as digits as its factorization.

164345522261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The spelling of 164345522261 in words is "one hundred sixty-four billion, three hundred forty-five million, five hundred twenty-two thousand, two hundred sixty-one".