64756478 has 8 divisors (see below), whose sum is σ = 100484280. Its totient is φ = 31261720.

The previous prime is 64756469. The next prime is 64756481. The reversal of 64756478 is 87465746.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558188 + ... + 558303.

It is an arithmetic number, because the mean of its divisors is an integer number (12560535).

Almost surely, 2^64756478 is an apocalyptic number.

64756478 is a deficient number, since it is larger than the sum of its proper divisors (35727802).

64756478 is a wasteful number, since it uses less digits than its factorization.

64756478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116522.

The product of its digits is 1128960, while the sum is 47.

The square root of 64756478 is about 8047.1409829827. The cubic root of 64756478 is about 401.5698268826.

The spelling of 64756478 in words is "sixty-four million, seven hundred fifty-six thousand, four hundred seventy-eight".