7994887685424 has 480 divisors, whose sum is σ = 25020939390720. Its totient is φ = 2466072677376.

The previous prime is 7994887685417. The next prime is 7994887685527. The reversal of 7994887685424 is 4245867884997.

It is a happy number.

7994887685424 is a `hidden beast` number, since 7 + 9 + 9 + 4 + 8 + 8 + 7 + 68 + 542 + 4 = 666.

It is a super-3 number, since 3×7994887685424³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 279497907 + ... + 279526509.

It is an arithmetic number, because the mean of its divisors is an integer number (52126957064).

Almost surely, 2^{7994887685424} is an apocalyptic number.

7994887685424 is a gapful number since it is divisible by the number (74) 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 7994887685424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12510469695360).

7994887685424 is an abundant number, since it is smaller than the sum of its proper divisors (17026051705296).

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

7994887685424 is a wasteful number, since it uses less digits than its factorization.

7994887685424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28759 (or 28741 counting only the distinct ones).

The product of its digits is 7803371520, while the sum is 81.

The spelling of 7994887685424 in words is "seven trillion, nine hundred ninety-four billion, eight hundred eighty-seven million, six hundred eighty-five thousand, four hundred twenty-four".