64188457 has 2 divisors, whose sum is σ = 64188458. Its totient is φ = 64188456.

The previous prime is 64188431. The next prime is 64188497. The reversal of 64188457 is 75488146.

64188457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 2785561 = 7836^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 64188457 - 2¹⁹ = 63664169 is a prime.

It is not a weakly prime, because it can be changed into another prime (64188427) 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, 32094228 + 32094229.

It is an arithmetic number, because the mean of its divisors is an integer number (32094229).

Almost surely, 2^64188457 is an apocalyptic number.

It is an amenable number.

64188457 is a deficient number, since it is larger than the sum of its proper divisors (1).

64188457 is an equidigital number, since it uses as much as digits as its factorization.

64188457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 43.

The square root of 64188457 is about 8011.7699043345. The cubic root of 64188457 is about 400.3922340055.

It can be divided in two parts, 641 and 88457, that added together give a palindrome (89098).

The spelling of 64188457 in words is "sixty-four million, one hundred eighty-eight thousand, four hundred fifty-seven".