7944500018 has 16 divisors (see below), whose sum is σ = 14666769600. Its totient is φ = 3142879056.

The previous prime is 7944500017. The next prime is 7944500023. The reversal of 7944500018 is 8100054497.

It is not an unprimeable number, because it can be changed into a prime (7944500017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21825368 + ... + 21825731.

It is an arithmetic number, because the mean of its divisors is an integer number (916673100).

Almost surely, 2^7944500018 is an apocalyptic number.

7944500018 is a deficient number, since it is larger than the sum of its proper divisors (6722269582).

7944500018 is a wasteful number, since it uses less digits than its factorization.

7944500018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43651121.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 7944500018 is about 89131.9247968987. The cubic root of 7944500018 is about 1995.3642647813.

The spelling of 7944500018 in words is "seven billion, nine hundred forty-four million, five hundred thousand, eighteen".