64673638 has 8 divisors (see below), whose sum is σ = 97628832. Its totient is φ = 32130696.

The previous prime is 64673579. The next prime is 64673711. The reversal of 64673638 is 83637646.

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

It is a junction number, because it is equal to n+sod(n) for n = 64673594 and 64673603.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 102670 + ... + 103297.

It is an arithmetic number, because the mean of its divisors is an integer number (12203604).

Almost surely, 2^64673638 is an apocalyptic number.

64673638 is a deficient number, since it is larger than the sum of its proper divisors (32955194).

64673638 is a wasteful number, since it uses less digits than its factorization.

64673638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206126.

The product of its digits is 435456, while the sum is 43.

The square root of 64673638 is about 8041.9921661240. The cubic root of 64673638 is about 401.3985171758.

The spelling of 64673638 in words is "sixty-four million, six hundred seventy-three thousand, six hundred thirty-eight".