7999655040 has 512 divisors, whose sum is σ = 30844800000. Its totient is φ = 1947746304.

The previous prime is 7999655033. The next prime is 7999655051. The reversal of 7999655040 is 405569997.

7999655040 is a `hidden beast` number, since 79 + 9 + 9 + 65 + 504 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33471241 + ... + 33471479.

It is an arithmetic number, because the mean of its divisors is an integer number (60243750).

Almost surely, 2^7999655040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7999655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15422400000).

7999655040 is an abundant number, since it is smaller than the sum of its proper divisors (22845144960).

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

7999655040 is a wasteful number, since it uses less digits than its factorization.

7999655040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The square root of 7999655040 is about 89440.7906941794. The cubic root of 7999655040 is about 1999.9712529201.

The spelling of 7999655040 in words is "seven billion, nine hundred ninety-nine million, six hundred fifty-five thousand, forty".