64673632515 has 16 divisors (see below), whose sum is σ = 103483117728. Its totient is φ = 34490835456.

The previous prime is 64673632489. The next prime is 64673632523. The reversal of 64673632515 is 51523637646.

It is not a de Polignac number, because 64673632515 - 2¹² = 64673628419 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 224529 + ... + 423981.

It is an arithmetic number, because the mean of its divisors is an integer number (6467694858).

Almost surely, 2^64673632515 is an apocalyptic number.

64673632515 is a deficient number, since it is larger than the sum of its proper divisors (38809485213).

64673632515 is a wasteful number, since it uses less digits than its factorization.

64673632515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221078.

The product of its digits is 2721600, while the sum is 48.

The spelling of 64673632515 in words is "sixty-four billion, six hundred seventy-three million, six hundred thirty-two thousand, five hundred fifteen".