97809319008 has 72 divisors (see below), whose sum is σ = 278192508048. Its totient is φ = 32597567232.

The previous prime is 97809318979. The next prime is 97809319009. The reversal of 97809319008 is 80091390879.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97809319009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890541 + ... + 1941587.

It is an arithmetic number, because the mean of its divisors is an integer number (3863784834).

Almost surely, 2^97809319008 is an apocalyptic number.

It is an amenable number.

97809319008 is an abundant number, since it is smaller than the sum of its proper divisors (180383189040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97809319008 is a wasteful number, since it uses less digits than its factorization.

97809319008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57716 (or 57705 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 97809319008 in words is "ninety-seven billion, eight hundred nine million, three hundred nineteen thousand, eight".