7998324644 has 12 divisors (see below), whose sum is σ = 13998493824. Its totient is φ = 3998754984.

The previous prime is 7998324617. The next prime is 7998324647. The reversal of 7998324644 is 4464238997.

It is a super-2 number, since 2×7998324644² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7998324644.

It is not an unprimeable number, because it can be changed into a prime (7998324647) 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, 55292 + ... + 138035.

It is an arithmetic number, because the mean of its divisors is an integer number (1166541152).

Almost surely, 2^7998324644 is an apocalyptic number.

It is an amenable number.

7998324644 is a deficient number, since it is larger than the sum of its proper divisors (6000169180).

7998324644 is a wasteful number, since it uses less digits than its factorization.

7998324644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203674 (or 203672 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The square root of 7998324644 is about 89433.3530848531. The cubic root of 7998324644 is about 1999.8603772530.

The spelling of 7998324644 in words is "seven billion, nine hundred ninety-eight million, three hundred twenty-four thousand, six hundred forty-four".