64479615 has 16 divisors (see below), whose sum is σ = 106725600. Its totient is φ = 33203072.

The previous prime is 64479599. The next prime is 64479619. The reversal of 64479615 is 51697446.

It is a cyclic number.

It is not a de Polignac number, because 64479615 - 2⁴ = 64479599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64479619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73680 + ... + 74549.

It is an arithmetic number, because the mean of its divisors is an integer number (6670350).

Almost surely, 2^64479615 is an apocalyptic number.

64479615 is a deficient number, since it is larger than the sum of its proper divisors (42245985).

64479615 is a wasteful number, since it uses less digits than its factorization.

64479615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148266.

The product of its digits is 181440, while the sum is 42.

The square root of 64479615 is about 8029.9199871481. The cubic root of 64479615 is about 400.9967122655.

The spelling of 64479615 in words is "sixty-four million, four hundred seventy-nine thousand, six hundred fifteen".