64825181 has 2 divisors, whose sum is σ = 64825182. Its totient is φ = 64825180.

The previous prime is 64825177. The next prime is 64825183. The reversal of 64825181 is 18152846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34409956 + 30415225 = 5866^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 64825181 - 2² = 64825177 is a prime.

It is a super-2 number, since 2×64825181² = 8404608183365522, which contains 22 as substring.

Together with 64825183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64825183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32412590 + 32412591.

It is an arithmetic number, because the mean of its divisors is an integer number (32412591).

Almost surely, 2^64825181 is an apocalyptic number.

It is an amenable number.

64825181 is a deficient number, since it is larger than the sum of its proper divisors (1).

64825181 is an equidigital number, since it uses as much as digits as its factorization.

64825181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 35.

The square root of 64825181 is about 8051.4086345186. The cubic root of 64825181 is about 401.7117910619.

The spelling of 64825181 in words is "sixty-four million, eight hundred twenty-five thousand, one hundred eighty-one".