164544551 has 2 divisors, whose sum is σ = 164544552. Its totient is φ = 164544550.

The previous prime is 164544539. The next prime is 164544571. The reversal of 164544551 is 155445461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164544551 - 2²² = 160350247 is a prime.

It is equal to p_9214919 and since 164544551 and 9214919 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164544571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82272275 + 82272276.

It is an arithmetic number, because the mean of its divisors is an integer number (82272276).

Almost surely, 2^164544551 is an apocalyptic number.

164544551 is a deficient number, since it is larger than the sum of its proper divisors (1).

164544551 is an equidigital number, since it uses as much as digits as its factorization.

164544551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 35.

The square root of 164544551 is about 12827.4919996077. The cubic root of 164544551 is about 547.9755336991.

The spelling of 164544551 in words is "one hundred sixty-four million, five hundred forty-four thousand, five hundred fifty-one".