97639678499 has 8 divisors (see below), whose sum is σ = 111147144192. Its totient is φ = 84904068040.

The previous prime is 97639678489. The next prime is 97639678529. The reversal of 97639678499 is 99487693679.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-97639678499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97639678439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192963539 + ... + 192964044.

It is an arithmetic number, because the mean of its divisors is an integer number (13893393024).

Almost surely, 2^97639678499 is an apocalyptic number.

97639678499 is a deficient number, since it is larger than the sum of its proper divisors (13507465693).

97639678499 is a wasteful number, since it uses less digits than its factorization.

97639678499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385927617.

The product of its digits is 1111065984, while the sum is 77.

The spelling of 97639678499 in words is "ninety-seven billion, six hundred thirty-nine million, six hundred seventy-eight thousand, four hundred ninety-nine".