64564838474636 has 6 divisors (see below), whose sum is σ = 112988467330620. Its totient is φ = 32282419237316.

The previous prime is 64564838474593. The next prime is 64564838474671. The reversal of 64564838474636 is 63647483846546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8070604809326 + ... + 8070604809333.

It is an arithmetic number, because the mean of its divisors is an integer number (18831411221770).

Almost surely, 2^{64564838474636} is an apocalyptic number.

It is an amenable number.

64564838474636 is a deficient number, since it is larger than the sum of its proper divisors (48423628855984).

64564838474636 is a wasteful number, since it uses less digits than its factorization.

64564838474636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16141209618663 (or 16141209618661 counting only the distinct ones).

The product of its digits is 6688604160, while the sum is 74.

The spelling of 64564838474636 in words is "sixty-four trillion, five hundred sixty-four billion, eight hundred thirty-eight million, four hundred seventy-four thousand, six hundred thirty-six".