97639678500 has 576 divisors, whose sum is σ = 377204615424. Its totient is φ = 19385856000.

The previous prime is 97639678489. The next prime is 97639678529. The reversal of 97639678500 is 587693679.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16240495 + ... + 16246505.

It is an arithmetic number, because the mean of its divisors is an integer number (654869124).

Almost surely, 2^97639678500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97639678500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188602307712).

97639678500 is an abundant number, since it is smaller than the sum of its proper divisors (279564936924).

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

97639678500 is a wasteful number, since it uses less digits than its factorization.

97639678500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077 (or 6058 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 60.

The spelling of 97639678500 in words is "ninety-seven billion, six hundred thirty-nine million, six hundred seventy-eight thousand, five hundred".