83848681891 has 4 divisors (see below), whose sum is σ = 90298580512. Its totient is φ = 77398783272.

The previous prime is 83848681811. The next prime is 83848681933. The reversal of 83848681891 is 19818684838.

It is a happy number.

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 83848681891 - 2²¹ = 83846584739 is a prime.

It is a super-2 number, since 2×83848681891² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83848681811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3224949291 + ... + 3224949316.

It is an arithmetic number, because the mean of its divisors is an integer number (22574645128).

Almost surely, 2^83848681891 is an apocalyptic number.

83848681891 is a deficient number, since it is larger than the sum of its proper divisors (6449898621).

83848681891 is a wasteful number, since it uses less digits than its factorization.

83848681891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449898620.

The product of its digits is 21233664, while the sum is 64.

The spelling of 83848681891 in words is "eighty-three billion, eight hundred forty-eight million, six hundred eighty-one thousand, eight hundred ninety-one".