164550761 has 2 divisors, whose sum is σ = 164550762. Its totient is φ = 164550760.

The previous prime is 164550731. The next prime is 164550767. The reversal of 164550761 is 167055461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151905625 + 12645136 = 12325^2 + 3556^2 .

It is an emirp because it is prime and its reverse (167055461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164550761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (164550767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82275380 + 82275381.

It is an arithmetic number, because the mean of its divisors is an integer number (82275381).

Almost surely, 2^164550761 is an apocalyptic number.

It is an amenable number.

164550761 is a deficient number, since it is larger than the sum of its proper divisors (1).

164550761 is an equidigital number, since it uses as much as digits as its factorization.

164550761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 164550761 is about 12827.7340555532. The cubic root of 164550761 is about 547.9824272430.

The spelling of 164550761 in words is "one hundred sixty-four million, five hundred fifty thousand, seven hundred sixty-one".