64535657 has 2 divisors, whose sum is σ = 64535658. Its totient is φ = 64535656.

The previous prime is 64535651. The next prime is 64535671. The reversal of 64535657 is 75653546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49294441 + 15241216 = 7021^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 64535657 - 2¹⁸ = 64273513 is a prime.

It is not a weakly prime, because it can be changed into another prime (64535651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32267828 + 32267829.

It is an arithmetic number, because the mean of its divisors is an integer number (32267829).

Almost surely, 2^64535657 is an apocalyptic number.

It is an amenable number.

64535657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64535657 is an equidigital number, since it uses as much as digits as its factorization.

64535657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 41.

The square root of 64535657 is about 8033.4088032416. The cubic root of 64535657 is about 401.1128531070.

The spelling of 64535657 in words is "sixty-four million, five hundred thirty-five thousand, six hundred fifty-seven".