7998716644 has 24 divisors (see below), whose sum is σ = 14081558400. Its totient is φ = 3975453504.

The previous prime is 7998716611. The next prime is 7998716657. The reversal of 7998716644 is 4466178997.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945417 + ... + 953839.

It is an arithmetic number, because the mean of its divisors is an integer number (586731600).

Almost surely, 2^7998716644 is an apocalyptic number.

It is an amenable number.

7998716644 is a deficient number, since it is larger than the sum of its proper divisors (6082841756).

7998716644 is a wasteful number, since it uses less digits than its factorization.

7998716644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9819 (or 9817 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 61.

The square root of 7998716644 is about 89435.5446341107. The cubic root of 7998716644 is about 1999.8930479474.

The spelling of 7998716644 in words is "seven billion, nine hundred ninety-eight million, seven hundred sixteen thousand, six hundred forty-four".