7868645906 has 16 divisors (see below), whose sum is σ = 13149924480. Its totient is φ = 3500557680.

The previous prime is 7868645881. The next prime is 7868645923. The reversal of 7868645906 is 6095468687.

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, 3803921 + ... + 3805988.

It is an arithmetic number, because the mean of its divisors is an integer number (821870280).

Almost surely, 2^7868645906 is an apocalyptic number.

7868645906 is a deficient number, since it is larger than the sum of its proper divisors (5281278574).

7868645906 is a wasteful number, since it uses less digits than its factorization.

7868645906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7609969.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The square root of 7868645906 is about 88705.3882579858. The cubic root of 7868645906 is about 1988.9933635951.

The spelling of 7868645906 in words is "seven billion, eight hundred sixty-eight million, six hundred forty-five thousand, nine hundred six".