64778314 has 8 divisors (see below), whose sum is σ = 99235008. Its totient is φ = 31699980.

The previous prime is 64778303. The next prime is 64778317. The reversal of 64778314 is 41387746.

64778314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64778317) 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 3 ways as a sum of consecutive naturals, for example, 344472 + ... + 344659.

It is an arithmetic number, because the mean of its divisors is an integer number (12404376).

Almost surely, 2^64778314 is an apocalyptic number.

64778314 is a deficient number, since it is larger than the sum of its proper divisors (34456694).

64778314 is a wasteful number, since it uses less digits than its factorization.

64778314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689180.

The product of its digits is 112896, while the sum is 40.

The square root of 64778314 is about 8048.4976237805. The cubic root of 64778314 is about 401.6149584977.

It can be divided in two parts, 647 and 78314, that added together give a square (78961 = 281²).

The spelling of 64778314 in words is "sixty-four million, seven hundred seventy-eight thousand, three hundred fourteen".