73664515 has 16 divisors (see below), whose sum is σ = 93761856. Its totient is φ = 55440000.

The previous prime is 73664497. The next prime is 73664533. The reversal of 73664515 is 51546637.

It is an interprime number because it is at equal distance from previous prime (73664497) and next prime (73664533).

It is not a de Polignac number, because 73664515 - 2¹¹ = 73662467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765 + ... + 12265.

It is an arithmetic number, because the mean of its divisors is an integer number (5860116).

Almost surely, 2^73664515 is an apocalyptic number.

73664515 is a deficient number, since it is larger than the sum of its proper divisors (20097341).

73664515 is a wasteful number, since it uses less digits than its factorization.

73664515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10590.

The product of its digits is 75600, while the sum is 37.

The square root of 73664515 is about 8582.8034464270. The cubic root of 73664515 is about 419.1982342246.

It can be divided in two parts, 7366 and 4515, that added together give a square (11881 = 109²).

The spelling of 73664515 in words is "seventy-three million, six hundred sixty-four thousand, five hundred fifteen".