7981618148 has 72 divisors (see below), whose sum is σ = 17252656512. Its totient is φ = 3158926848.

The previous prime is 7981618129. The next prime is 7981618153. The reversal of 7981618148 is 8418161897.

It is a self number, because there is not a number n which added to its sum of digits gives 7981618148.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534236 + ... + 548972.

Almost surely, 2^7981618148 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 7981618148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8626328256).

7981618148 is an abundant number, since it is smaller than the sum of its proper divisors (9271038364).

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

7981618148 is a wasteful number, since it uses less digits than its factorization.

7981618148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14829 (or 14798 counting only the distinct ones).

The product of its digits is 774144, while the sum is 53.

The square root of 7981618148 is about 89339.9023281311. The cubic root of 7981618148 is about 1998.4670042623.

The spelling of 7981618148 in words is "seven billion, nine hundred eighty-one million, six hundred eighteen thousand, one hundred forty-eight".