64689113533 has 12 divisors (see below), whose sum is σ = 71402103360. Its totient is φ = 58562199080.

The previous prime is 64689113459. The next prime is 64689113563. The reversal of 64689113533 is 33531198646.

It is not a de Polignac number, because 64689113533 - 2¹⁷ = 64688982461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64689113563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089535 + ... + 1147372.

It is an arithmetic number, because the mean of its divisors is an integer number (5950175280).

Almost surely, 2^64689113533 is an apocalyptic number.

It is an amenable number.

64689113533 is a deficient number, since it is larger than the sum of its proper divisors (6712989827).

64689113533 is a wasteful number, since it uses less digits than its factorization.

64689113533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237168 (or 2237157 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The spelling of 64689113533 in words is "sixty-four billion, six hundred eighty-nine million, one hundred thirteen thousand, five hundred thirty-three".