6421068815 has 16 divisors (see below), whose sum is σ = 9188909568. Its totient is φ = 4211582496.

The previous prime is 6421068811. The next prime is 6421068853. The reversal of 6421068815 is 5188601246.

It is a cyclic number.

It is not a de Polignac number, because 6421068815 - 2² = 6421068811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421068811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987437 + ... + 3989046.

It is an arithmetic number, because the mean of its divisors is an integer number (574306848).

Almost surely, 2^6421068815 is an apocalyptic number.

6421068815 is a deficient number, since it is larger than the sum of its proper divisors (2767840753).

6421068815 is a wasteful number, since it uses less digits than its factorization.

6421068815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7976518.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 6421068815 is about 80131.5718989713. The cubic root of 6421068815 is about 1858.6706513810.

The spelling of 6421068815 in words is "six billion, four hundred twenty-one million, sixty-eight thousand, eight hundred fifteen".