997865679360 has 640 divisors, whose sum is σ = 3691332311040. Its totient is φ = 227568844800.

The previous prime is 997865679359. The next prime is 997865679361. The reversal of 997865679360 is 63976568799.

It is an interprime number because it is at equal distance from previous prime (997865679359) and next prime (997865679361).

It is a tau number, because it is divible by the number of its divisors (640).

It is not an unprimeable number, because it can be changed into a prime (997865679361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118521231 + ... + 118529649.

It is an arithmetic number, because the mean of its divisors is an integer number (5767706736).

Almost surely, 2^997865679360 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 997865679360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1845666155520).

997865679360 is an abundant number, since it is smaller than the sum of its proper divisors (2693466631680).

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

997865679360 is a wasteful number, since it uses less digits than its factorization.

997865679360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540 (or 8524 counting only the distinct ones).

The product of its (nonzero) digits is 925888320, while the sum is 75.

The spelling of 997865679360 in words is "nine hundred ninety-seven billion, eight hundred sixty-five million, six hundred seventy-nine thousand, three hundred sixty".