64896909496138 has 24 divisors (see below), whose sum is σ = 98221373390700. Its totient is φ = 32158886753280.

The previous prime is 64896909496103. The next prime is 64896909496187. The reversal of 64896909496138 is 83169490969846.

It can be written as a sum of positive squares in 6 ways, for example, as 8062152608449 + 56834756887689 = 2839393^2 + 7538883^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18308908 + ... + 21564088.

Almost surely, 2^{64896909496138} is an apocalyptic number.

64896909496138 is a deficient number, since it is larger than the sum of its proper divisors (33324463894562).

64896909496138 is a wasteful number, since it uses less digits than its factorization.

64896909496138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255930 (or 3255781 counting only the distinct ones).

The product of its (nonzero) digits is 4353564672, while the sum is 82.

The spelling of 64896909496138 in words is "sixty-four trillion, eight hundred ninety-six billion, nine hundred nine million, four hundred ninety-six thousand, one hundred thirty-eight".