64469638535 has 4 divisors (see below), whose sum is σ = 77363566248. Its totient is φ = 51575710824.

The previous prime is 64469638501. The next prime is 64469638547. The reversal of 64469638535 is 53583696446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64469638535 - 2¹⁰ = 64469637511 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446963849 + ... + 6446963858.

It is an arithmetic number, because the mean of its divisors is an integer number (19340891562).

Almost surely, 2^64469638535 is an apocalyptic number.

64469638535 is a deficient number, since it is larger than the sum of its proper divisors (12893927713).

64469638535 is a wasteful number, since it uses less digits than its factorization.

64469638535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12893927712.

The product of its digits is 55987200, while the sum is 59.

The spelling of 64469638535 in words is "sixty-four billion, four hundred sixty-nine million, six hundred thirty-eight thousand, five hundred thirty-five".