8721961080 has 256 divisors, whose sum is σ = 30740705280. Its totient is φ = 1938376704.

The previous prime is 8721961067. The next prime is 8721961103. The reversal of 8721961080 is 801691278.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6829402 + ... + 6830678.

It is an arithmetic number, because the mean of its divisors is an integer number (120080880).

Almost surely, 2^8721961080 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 8721961080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15370352640).

8721961080 is an abundant number, since it is smaller than the sum of its proper divisors (22018744200).

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

8721961080 is a wasteful number, since it uses less digits than its factorization.

8721961080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 8721961080 is about 93391.4400788423. The cubic root of 8721961080 is about 2058.4392205613.

The spelling of 8721961080 in words is "eight billion, seven hundred twenty-one million, nine hundred sixty-one thousand, eighty".