164849494549 has 2 divisors, whose sum is σ = 164849494550. Its totient is φ = 164849494548.

The previous prime is 164849494517. The next prime is 164849494571. The reversal of 164849494549 is 945494948461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156247859524 + 8601635025 = 395282^2 + 92745^2 .

It is a cyclic number.

It is not a de Polignac number, because 164849494549 - 2⁵ = 164849494517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164849495549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82424747274 + 82424747275.

It is an arithmetic number, because the mean of its divisors is an integer number (82424747275).

Almost surely, 2^164849494549 is an apocalyptic number.

It is an amenable number.

164849494549 is a deficient number, since it is larger than the sum of its proper divisors (1).

164849494549 is an equidigital number, since it uses as much as digits as its factorization.

164849494549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179159040, while the sum is 67.

The spelling of 164849494549 in words is "one hundred sixty-four billion, eight hundred forty-nine million, four hundred ninety-four thousand, five hundred forty-nine".