7851852644 has 6 divisors (see below), whose sum is σ = 13740742134.
Its totient is φ = 3925926320.
The previous prime is 7851852643. The next prime is 7851852653. The reversal of 7851852644 is 4462581587.
It can be written as a sum of positive squares in only one way, i.e., 5721107044 + 2130745600 = 75638^2 + 46160^2
It is a junction number, because it is equal to n+sod(n) for n = 7851852592 and 7851852601.
It is not an unprimeable number, because it can be changed into a prime (7851852643) 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 as a sum of consecutive naturals, namely, 981481577 + ... + 981481584.
It is an arithmetic number, because the mean of its divisors is an integer number (2290123689).
Almost surely, 27851852644 is an apocalyptic number.
It is an amenable number.
7851852644 is a deficient number, since it is larger than the sum of its proper divisors (5888889490).
7851852644 is a wasteful number, since it uses less digits than its factorization.
7851852644 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1962963165 (or 1962963163 counting only the distinct ones).
The product of its digits is 2150400, while the sum is 50.
The square root of 7851852644 is about 88610.6801914984.
The cubic root of 7851852644 is about 1987.5773860880.
The spelling of 7851852644 in words is "seven billion, eight hundred fifty-one million, eight hundred fifty-two thousand, six hundred forty-four".