97897079808 has 264 divisors, whose sum is σ = 309368841600. Its totient is φ = 29570088960.

The previous prime is 97897079771. The next prime is 97897079809. The reversal of 97897079808 is 80897079879.

It is a tau number, because it is divible by the number of its divisors (264).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (97897079809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35378841 + ... + 35381607.

Almost surely, 2^97897079808 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 97897079808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154684420800).

97897079808 is an abundant number, since it is smaller than the sum of its proper divisors (211471761792).

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

97897079808 is a wasteful number, since it uses less digits than its factorization.

97897079808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153 (or 3132 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 72.

The spelling of 97897079808 in words is "ninety-seven billion, eight hundred ninety-seven million, seventy-nine thousand, eight hundred eight".