83856465838 has 32 divisors (see below), whose sum is σ = 134067363840. Its totient is φ = 39224829600.

The previous prime is 83856465827. The next prime is 83856465839.

83856465838 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×83856465838² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 83856465838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83856465839) 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, 1441431 + ... + 1498477.

It is an arithmetic number, because the mean of its divisors is an integer number (4189605120).

Almost surely, 2^83856465838 is an apocalyptic number.

83856465838 is a deficient number, since it is larger than the sum of its proper divisors (50210898002).

83856465838 is a wasteful number, since it uses less digits than its factorization.

83856465838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57552.

The product of its digits is 132710400, while the sum is 64.

The spelling of 83856465838 in words is "eighty-three billion, eight hundred fifty-six million, four hundred sixty-five thousand, eight hundred thirty-eight".