7856149646 has 16 divisors (see below), whose sum is σ = 12159776160. Its totient is φ = 3804289920.

The previous prime is 7856149597. The next prime is 7856149663. The reversal of 7856149646 is 6469416587.

It is a junction number, because it is equal to n+sod(n) for n = 7856149591 and 7856149600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338426 + ... + 360893.

It is an arithmetic number, because the mean of its divisors is an integer number (759986010).

Almost surely, 2^7856149646 is an apocalyptic number.

7856149646 is a deficient number, since it is larger than the sum of its proper divisors (4303626514).

7856149646 is a wasteful number, since it uses less digits than its factorization.

7856149646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699499.

The product of its digits is 8709120, while the sum is 56.

The square root of 7856149646 is about 88634.9233993012. The cubic root of 7856149646 is about 1987.9398935914.

The spelling of 7856149646 in words is "seven billion, eight hundred fifty-six million, one hundred forty-nine thousand, six hundred forty-six".