164991424199477 has 2 divisors, whose sum is σ = 164991424199478. Its totient is φ = 164991424199476.

The previous prime is 164991424199341. The next prime is 164991424199509. The reversal of 164991424199477 is 774991424199461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113061731036401 + 51929693163076 = 10633049^2 + 7206226^2 .

It is a cyclic number.

It is not a de Polignac number, because 164991424199477 - 2²⁶ = 164991357090613 is a prime.

It is a super-2 number, since 2×164991424199477² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164991424199398 and 164991424199407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164991424199177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82495712099738 + 82495712099739.

It is an arithmetic number, because the mean of its divisors is an integer number (82495712099739).

Almost surely, 2^{164991424199477} is an apocalyptic number.

It is an amenable number.

164991424199477 is a deficient number, since it is larger than the sum of its proper divisors (1).

164991424199477 is an equidigital number, since it uses as much as digits as its factorization.

164991424199477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 77.

The spelling of 164991424199477 in words is "one hundred sixty-four trillion, nine hundred ninety-one billion, four hundred twenty-four million, one hundred ninety-nine thousand, four hundred seventy-seven".