97818681879 has 6 divisors (see below), whose sum is σ = 141293651616. Its totient is φ = 65212454580.

The previous prime is 97818681859. The next prime is 97818681893.

97818681879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 97818681879 - 2¹¹ = 97818679831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97818681859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5434371207 + ... + 5434371224.

It is an arithmetic number, because the mean of its divisors is an integer number (23548941936).

Almost surely, 2^97818681879 is an apocalyptic number.

97818681879 is a deficient number, since it is larger than the sum of its proper divisors (43474969737).

97818681879 is a wasteful number, since it uses less digits than its factorization.

97818681879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10868742437 (or 10868742434 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 72.

The spelling of 97818681879 in words is "ninety-seven billion, eight hundred eighteen million, six hundred eighty-one thousand, eight hundred seventy-nine".