64455257 has 2 divisors, whose sum is σ = 64455258. Its totient is φ = 64455256.

The previous prime is 64455247. The next prime is 64455263. The reversal of 64455257 is 75255446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52765696 + 11689561 = 7264^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 64455257 - 2⁴ = 64455241 is a prime.

It is a super-3 number, since 3×64455257³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64455257.

It is not a weakly prime, because it can be changed into another prime (64455247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32227628 + 32227629.

It is an arithmetic number, because the mean of its divisors is an integer number (32227629).

Almost surely, 2^64455257 is an apocalyptic number.

It is an amenable number.

64455257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64455257 is an equidigital number, since it uses as much as digits as its factorization.

64455257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168000, while the sum is 38.

The square root of 64455257 is about 8028.4031413476. The cubic root of 64455257 is about 400.9462120254.

The spelling of 64455257 in words is "sixty-four million, four hundred fifty-five thousand, two hundred fifty-seven".