6215856396 has 12 divisors (see below), whose sum is σ = 14503664952. Its totient is φ = 2071952128.

The previous prime is 6215856391. The next prime is 6215856419. The reversal of 6215856396 is 6936585126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6215856391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258994005 + ... + 258994028.

It is an arithmetic number, because the mean of its divisors is an integer number (1208638746).

Almost surely, 2^6215856396 is an apocalyptic number.

It is an amenable number.

6215856396 is an abundant number, since it is smaller than the sum of its proper divisors (8287808556).

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

6215856396 is a wasteful number, since it uses less digits than its factorization.

6215856396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517988040 (or 517988038 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 51.

The square root of 6215856396 is about 78840.7026604913. The cubic root of 6215856396 is about 1838.6553262304.

The spelling of 6215856396 in words is "six billion, two hundred fifteen million, eight hundred fifty-six thousand, three hundred ninety-six".