64478679 has 8 divisors (see below), whose sum is σ = 88295280. Its totient is φ = 41823936.

The previous prime is 64478677. The next prime is 64478699. The reversal of 64478679 is 97687446.

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

It is not a de Polignac number, because 64478679 - 2¹ = 64478677 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64478677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290334 + ... + 290555.

It is an arithmetic number, because the mean of its divisors is an integer number (11036910).

Almost surely, 2^64478679 is an apocalyptic number.

64478679 is a deficient number, since it is larger than the sum of its proper divisors (23816601).

64478679 is a wasteful number, since it uses less digits than its factorization.

64478679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580929.

The product of its digits is 2032128, while the sum is 51.

The square root of 64478679 is about 8029.8617049112. The cubic root of 64478679 is about 400.9947719378.

The spelling of 64478679 in words is "sixty-four million, four hundred seventy-eight thousand, six hundred seventy-nine".