164247970949 has 2 divisors, whose sum is σ = 164247970950. Its totient is φ = 164247970948.

The previous prime is 164247970897. The next prime is 164247971003. The reversal of 164247970949 is 949079742461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87930040900 + 76317930049 = 296530^2 + 276257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164247970949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164247970891 and 164247970900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164247970849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82123985474 + 82123985475.

It is an arithmetic number, because the mean of its divisors is an integer number (82123985475).

Almost surely, 2^164247970949 is an apocalyptic number.

It is an amenable number.

164247970949 is a deficient number, since it is larger than the sum of its proper divisors (1).

164247970949 is an equidigital number, since it uses as much as digits as its factorization.

164247970949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 164247970949 in words is "one hundred sixty-four billion, two hundred forty-seven million, nine hundred seventy thousand, nine hundred forty-nine".