7981360128 has 132 divisors (see below), whose sum is σ = 26338503360. Its totient is φ = 2280370176.

The previous prime is 7981360117. The next prime is 7981360139. The reversal of 7981360128 is 8210631897.

7981360128 is a `hidden beast` number, since 7 + 9 + 8 + 13 + 601 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (7981360117) and next prime (7981360139).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2653 + ... + 126371.

Almost surely, 2^7981360128 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 7981360128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13169251680).

7981360128 is an abundant number, since it is smaller than the sum of its proper divisors (18357143232).

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

7981360128 is a wasteful number, since it uses less digits than its factorization.

7981360128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123752 (or 123731 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7981360128 is about 89338.4582808546. The cubic root of 7981360128 is about 1998.4454693636.

The spelling of 7981360128 in words is "seven billion, nine hundred eighty-one million, three hundred sixty thousand, one hundred twenty-eight".