164345122050491 has 2 divisors, whose sum is σ = 164345122050492. Its totient is φ = 164345122050490.

The previous prime is 164345122050469. The next prime is 164345122050539. The reversal of 164345122050491 is 194050221543461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164345122050491 - 2³⁰ = 164344048308667 is a prime.

It is a super-2 number, since 2×164345122050491² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164345122010491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82172561025245 + 82172561025246.

It is an arithmetic number, because the mean of its divisors is an integer number (82172561025246).

Almost surely, 2^{164345122050491} is an apocalyptic number.

164345122050491 is a deficient number, since it is larger than the sum of its proper divisors (1).

164345122050491 is an equidigital number, since it uses as much as digits as its factorization.

164345122050491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 164345122050491 in words is "one hundred sixty-four trillion, three hundred forty-five billion, one hundred twenty-two million, fifty thousand, four hundred ninety-one".