7981202720 has 24 divisors (see below), whose sum is σ = 18855591804. Its totient is φ = 3192481024.

The previous prime is 7981202717. The next prime is 7981202741. The reversal of 7981202720 is 272021897.

It can be written as a sum of positive squares in 2 ways, for example, as 7507182736 + 474019984 = 86644^2 + 21772^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24941099 + ... + 24941418.

Almost surely, 2^7981202720 is an apocalyptic number.

It is an amenable number.

7981202720 is an abundant number, since it is smaller than the sum of its proper divisors (10874389084).

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

7981202720 is a wasteful number, since it uses less digits than its factorization.

7981202720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49882532 (or 49882524 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 7981202720 is about 89337.5773121255. The cubic root of 7981202720 is about 1998.4323315288.

The spelling of 7981202720 in words is "seven billion, nine hundred eighty-one million, two hundred two thousand, seven hundred twenty".