64478713 has 8 divisors (see below), whose sum is σ = 70155848. Its totient is φ = 58904064.

The previous prime is 64478699. The next prime is 64478717. The reversal of 64478713 is 31787446.

It can be written as a sum of positive squares in 4 ways, for example, as 8573184 + 55905529 = 2928^2 + 7477^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64478713 - 2⁹ = 64478201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64478717) 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, 24306 + ... + 26827.

It is an arithmetic number, because the mean of its divisors is an integer number (8769481).

Almost surely, 2^64478713 is an apocalyptic number.

It is an amenable number.

64478713 is a deficient number, since it is larger than the sum of its proper divisors (5677135).

64478713 is a wasteful number, since it uses less digits than its factorization.

64478713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51243.

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

The square root of 64478713 is about 8029.8638220084. The cubic root of 64478713 is about 400.9948424201.

The spelling of 64478713 in words is "sixty-four million, four hundred seventy-eight thousand, seven hundred thirteen".