6215642906 has 32 divisors (see below), whose sum is σ = 10550390400. Its totient is φ = 2720450880.

The previous prime is 6215642899. The next prime is 6215643001. The reversal of 6215642906 is 6092465126.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224915 + ... + 251033.

It is an arithmetic number, because the mean of its divisors is an integer number (329699700).

Almost surely, 2^6215642906 is an apocalyptic number.

6215642906 is a deficient number, since it is larger than the sum of its proper divisors (4334747494).

6215642906 is a wasteful number, since it uses less digits than its factorization.

6215642906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26534.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 6215642906 is about 78839.3487162343. The cubic root of 6215642906 is about 1838.6342758181.

The spelling of 6215642906 in words is "six billion, two hundred fifteen million, six hundred forty-two thousand, nine hundred six".