64195657 has 2 divisors, whose sum is σ = 64195658. Its totient is φ = 64195656.

The previous prime is 64195643. The next prime is 64195669. The reversal of 64195657 is 75659146.

64195657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 27762361 = 6036^2 + 5269^2 .

It is a cyclic number.

It is not a de Polignac number, because 64195657 - 2⁷ = 64195529 is a prime.

It is not a weakly prime, because it can be changed into another prime (64195697) 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, 32097828 + 32097829.

It is an arithmetic number, because the mean of its divisors is an integer number (32097829).

Almost surely, 2^64195657 is an apocalyptic number.

It is an amenable number.

64195657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64195657 is an equidigital number, since it uses as much as digits as its factorization.

64195657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 64195657 is about 8012.2192306501. The cubic root of 64195657 is about 400.4072040714.

The spelling of 64195657 in words is "sixty-four million, one hundred ninety-five thousand, six hundred fifty-seven".