7855434784 has 48 divisors (see below), whose sum is σ = 16296940800. Its totient is φ = 3716976384.

The previous prime is 7855434779. The next prime is 7855434787. The reversal of 7855434784 is 4874345587.

It is not an unprimeable number, because it can be changed into a prime (7855434787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 599697 + ... + 612655.

It is an arithmetic number, because the mean of its divisors is an integer number (339519600).

Almost surely, 2^7855434784 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 7855434784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8148470400).

7855434784 is an abundant number, since it is smaller than the sum of its proper divisors (8441506016).

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

7855434784 is a wasteful number, since it uses less digits than its factorization.

7855434784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13985 (or 13977 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 55.

The square root of 7855434784 is about 88630.8906871639. The cubic root of 7855434784 is about 1987.8795949354.

The spelling of 7855434784 in words is "seven billion, eight hundred fifty-five million, four hundred thirty-four thousand, seven hundred eighty-four".