97865896772 has 96 divisors (see below), whose sum is σ = 207355631616. Its totient is φ = 39526502400.

The previous prime is 97865896757. The next prime is 97865896789. The reversal of 97865896772 is 27769856879.

It is a self number, because there is not a number n which added to its sum of digits gives 97865896772.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21955568 + ... + 21960024.

It is an arithmetic number, because the mean of its divisors is an integer number (2159954496).

Almost surely, 2^97865896772 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 97865896772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103677815808).

97865896772 is an abundant number, since it is smaller than the sum of its proper divisors (109489734844).

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

97865896772 is a wasteful number, since it uses less digits than its factorization.

97865896772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5155 counting only the distinct ones).

The product of its digits is 640120320, while the sum is 74.

The spelling of 97865896772 in words is "ninety-seven billion, eight hundred sixty-five million, eight hundred ninety-six thousand, seven hundred seventy-two".