64843438135 has 16 divisors (see below), whose sum is σ = 91331608896. Its totient is φ = 43262339328.

The previous prime is 64843438117. The next prime is 64843438151. The reversal of 64843438135 is 53183434846.

It is a cyclic number.

It is not a de Polignac number, because 64843438135 - 2⁷ = 64843438007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25034782 + ... + 25037371.

It is an arithmetic number, because the mean of its divisors is an integer number (5708225556).

Almost surely, 2^64843438135 is an apocalyptic number.

64843438135 is a deficient number, since it is larger than the sum of its proper divisors (26488170761).

64843438135 is a wasteful number, since it uses less digits than its factorization.

64843438135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50072202.

The product of its digits is 3317760, while the sum is 49.

The spelling of 64843438135 in words is "sixty-four billion, eight hundred forty-three million, four hundred thirty-eight thousand, one hundred thirty-five".