8721761472 has 84 divisors (see below), whose sum is σ = 25085161920. Its totient is φ = 2897275392.

The previous prime is 8721761459. The next prime is 8721761473. The reversal of 8721761472 is 2741671278.

8721761472 is a `hidden beast` number, since 8 + 7 + 2 + 176 + 1 + 472 = 666.

It is not an unprimeable number, because it can be changed into a prime (8721761473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142929 + ... + 194607.

It is an arithmetic number, because the mean of its divisors is an integer number (298632880).

Almost surely, 2^8721761472 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 8721761472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12542580960).

8721761472 is an abundant number, since it is smaller than the sum of its proper divisors (16363400448).

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

8721761472 is a wasteful number, since it uses less digits than its factorization.

8721761472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51990 (or 51977 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 8721761472 is about 93390.3714094767. The cubic root of 8721761472 is about 2058.4235175152.

The spelling of 8721761472 in words is "eight billion, seven hundred twenty-one million, seven hundred sixty-one thousand, four hundred seventy-two".