64396338905 has 16 divisors (see below), whose sum is σ = 83966707200. Its totient is φ = 47231268480.

The previous prime is 64396338899. The next prime is 64396338989. The reversal of 64396338905 is 50983369346.

It is not a de Polignac number, because 64396338905 - 2⁸ = 64396338649 is a prime.

It is a super-3 number, since 3×64396338905³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10930220 + ... + 10936109.

It is an arithmetic number, because the mean of its divisors is an integer number (5247919200).

Almost surely, 2^64396338905 is an apocalyptic number.

It is an amenable number.

64396338905 is a deficient number, since it is larger than the sum of its proper divisors (19570368295).

64396338905 is a wasteful number, since it uses less digits than its factorization.

64396338905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866384.

The product of its (nonzero) digits is 12597120, while the sum is 56.

The spelling of 64396338905 in words is "sixty-four billion, three hundred ninety-six million, three hundred thirty-eight thousand, nine hundred five".