7989623792640 has 1408 divisors, whose sum is σ = 33443386859520. Its totient is φ = 1770919428096.

The previous prime is 7989623792627. The next prime is 7989623792659. The reversal of 7989623792640 is 462973269897.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6532807069 + ... + 6532808291.

It is an arithmetic number, because the mean of its divisors is an integer number (23752405440).

Almost surely, 2^{7989623792640} is an apocalyptic number.

7989623792640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7989623792640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16721693429760).

7989623792640 is an abundant number, since it is smaller than the sum of its proper divisors (25453763066880).

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

7989623792640 is a wasteful number, since it uses less digits than its factorization.

7989623792640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 493807104, while the sum is 72.

The spelling of 7989623792640 in words is "seven trillion, nine hundred eighty-nine billion, six hundred twenty-three million, seven hundred ninety-two thousand, six hundred forty".