64108181 has 2 divisors, whose sum is σ = 64108182. Its totient is φ = 64108180.

The previous prime is 64108129. The next prime is 64108189. The reversal of 64108181 is 18180146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62568100 + 1540081 = 7910^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 64108181 - 2⁶ = 64108117 is a prime.

It is a super-2 number, since 2×64108181² = 8219717742257522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64108189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32054090 + 32054091.

It is an arithmetic number, because the mean of its divisors is an integer number (32054091).

Almost surely, 2^64108181 is an apocalyptic number.

It is an amenable number.

64108181 is a deficient number, since it is larger than the sum of its proper divisors (1).

64108181 is an equidigital number, since it uses as much as digits as its factorization.

64108181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 64108181 is about 8006.7584577031. The cubic root of 64108181 is about 400.2252502154.

The spelling of 64108181 in words is "sixty-four million, one hundred eight thousand, one hundred eighty-one".