7964217918 has 40 divisors (see below), whose sum is σ = 17911697760. Its totient is φ = 2644928640.

The previous prime is 7964217917. The next prime is 7964217941. The reversal of 7964217918 is 8197124697.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7964217913) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46803 + ... + 134606.

It is an arithmetic number, because the mean of its divisors is an integer number (447792444).

Almost surely, 2^7964217918 is an apocalyptic number.

7964217918 is an abundant number, since it is smaller than the sum of its proper divisors (9947479842).

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

7964217918 is a wasteful number, since it uses less digits than its factorization.

7964217918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181694 (or 181685 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 7964217918 is about 89242.4670098267. The cubic root of 7964217918 is about 1997.0137030680.

The spelling of 7964217918 in words is "seven billion, nine hundred sixty-four million, two hundred seventeen thousand, nine hundred eighteen".