7998594643 has 4 divisors (see below), whose sum is σ = 8613871168. Its totient is φ = 7383318120.

The previous prime is 7998594641. The next prime is 7998594649. The reversal of 7998594643 is 3464958997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3464958997 = 19 ⋅182366263.

It is a cyclic number.

It is not a de Polignac number, because 7998594643 - 2¹ = 7998594641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7998594641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307638243 + ... + 307638268.

It is an arithmetic number, because the mean of its divisors is an integer number (2153467792).

Almost surely, 2^7998594643 is an apocalyptic number.

7998594643 is a deficient number, since it is larger than the sum of its proper divisors (615276525).

7998594643 is a wasteful number, since it uses less digits than its factorization.

7998594643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615276524.

The product of its digits is 58786560, while the sum is 64.

The square root of 7998594643 is about 89434.8625704764. The cubic root of 7998594643 is about 1999.8828800583.

The spelling of 7998594643 in words is "seven billion, nine hundred ninety-eight million, five hundred ninety-four thousand, six hundred forty-three".