9656297280 has 448 divisors, whose sum is σ = 39529390080. Its totient is φ = 2173298688.

The previous prime is 9656297267. The next prime is 9656297281. The reversal of 9656297280 is 827926569.

9656297280 is a `hidden beast` number, since 9 + 6 + 5 + 629 + 7 + 2 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9656297281) 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, 4050969 + ... + 4053351.

Almost surely, 2^9656297280 is an apocalyptic number.

9656297280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9656297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19764695040).

9656297280 is an abundant number, since it is smaller than the sum of its proper divisors (29873092800).

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

9656297280 is a wasteful number, since it uses less digits than its factorization.

9656297280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 9656297280 is about 98266.4606058446. The cubic root of 9656297280 is about 2129.4635427421.

It can be divided in two parts, 9656 and 297280, that added together give a triangular number (306936 = T₇₈₃).

The spelling of 9656297280 in words is "nine billion, six hundred fifty-six million, two hundred ninety-seven thousand, two hundred eighty".