64749855 has 32 divisors (see below), whose sum is σ = 113246208. Its totient is φ = 31449600.

The previous prime is 64749851. The next prime is 64749859. The reversal of 64749855 is 55894746.

64749855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64749851) and next prime (64749859).

It is not a de Polignac number, because 64749855 - 2² = 64749851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64749851) 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 in 31 ways as a sum of consecutive naturals, for example, 3810 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (3538944).

Almost surely, 2^64749855 is an apocalyptic number.

64749855 is a deficient number, since it is larger than the sum of its proper divisors (48496353).

64749855 is a wasteful number, since it uses less digits than its factorization.

64749855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8247.

The product of its digits is 1209600, while the sum is 48.

The square root of 64749855 is about 8046.7294598489. The cubic root of 64749855 is about 401.5561361667.

The spelling of 64749855 in words is "sixty-four million, seven hundred forty-nine thousand, eight hundred fifty-five".