64403135073 has 20 divisors (see below), whose sum is σ = 96899307120. Its totient is φ = 42626527992.

The previous prime is 64403135063. The next prime is 64403135077. The reversal of 64403135073 is 37053130446.

64403135073 is a `hidden beast` number, since 644 + 0 + 3 + 1 + 3 + 5 + 0 + 7 + 3 = 666.

It is not a de Polignac number, because 64403135073 - 2⁴ = 64403135057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64403135077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2848815 + ... + 2871332.

It is an arithmetic number, because the mean of its divisors is an integer number (4844965356).

Almost surely, 2^64403135073 is an apocalyptic number.

It is an amenable number.

64403135073 is a deficient number, since it is larger than the sum of its proper divisors (32496172047).

64403135073 is a wasteful number, since it uses less digits than its factorization.

64403135073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720298 (or 5720289 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 64403135073 in words is "sixty-four billion, four hundred three million, one hundred thirty-five thousand, seventy-three".