64838683847 has 16 divisors (see below), whose sum is σ = 74260745472. Its totient is φ = 55456591680.

The previous prime is 64838683841. The next prime is 64838683879. The reversal of 64838683847 is 74838683846.

It is not a de Polignac number, because 64838683847 - 2¹⁰ = 64838682823 is a prime.

It is a super-2 number, since 2×64838683847² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64838683841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8446403 + ... + 8454075.

It is an arithmetic number, because the mean of its divisors is an integer number (4641296592).

Almost surely, 2^64838683847 is an apocalyptic number.

64838683847 is a deficient number, since it is larger than the sum of its proper divisors (9422061625).

64838683847 is a wasteful number, since it uses less digits than its factorization.

64838683847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118.

The product of its digits is 148635648, while the sum is 65.

Subtracting 64838683847 from its reverse (74838683846), we obtain a palindrome (9999999999).

The spelling of 64838683847 in words is "sixty-four billion, eight hundred thirty-eight million, six hundred eighty-three thousand, eight hundred forty-seven".