64334481409 has 24 divisors (see below), whose sum is σ = 71141597856. Its totient is φ = 58133961600.

The previous prime is 64334481389. The next prime is 64334481439. The reversal of 64334481409 is 90418443346.

It is a de Polignac number, because none of the positive numbers 2^k-64334481409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64334481439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15167529 + ... + 15171769.

It is an arithmetic number, because the mean of its divisors is an integer number (2964233244).

Almost surely, 2^64334481409 is an apocalyptic number.

It is an amenable number.

64334481409 is a deficient number, since it is larger than the sum of its proper divisors (6807116447).

64334481409 is a wasteful number, since it uses less digits than its factorization.

64334481409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4978 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 64334481409 in words is "sixty-four billion, three hundred thirty-four million, four hundred eighty-one thousand, four hundred nine".