164223344977 has 2 divisors, whose sum is σ = 164223344978. Its totient is φ = 164223344976.

The previous prime is 164223344899. The next prime is 164223344983. The reversal of 164223344977 is 779443322461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101481110721 + 62742234256 = 318561^2 + 250484^2 .

It is a cyclic number.

It is not a de Polignac number, because 164223344977 - 2¹¹ = 164223342929 is a prime.

It is a super-2 number, since 2×164223344977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164223324977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82111672488 + 82111672489.

It is an arithmetic number, because the mean of its divisors is an integer number (82111672489).

Almost surely, 2^164223344977 is an apocalyptic number.

It is an amenable number.

164223344977 is a deficient number, since it is larger than the sum of its proper divisors (1).

164223344977 is an equidigital number, since it uses as much as digits as its factorization.

164223344977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 52.

The spelling of 164223344977 in words is "one hundred sixty-four billion, two hundred twenty-three million, three hundred forty-four thousand, nine hundred seventy-seven".