6865715421 has 48 divisors (see below), whose sum is σ = 10857300480. Its totient is φ = 4161991680.

The previous prime is 6865715419. The next prime is 6865715459. The reversal of 6865715421 is 1245175686.

6865715421 is a `hidden beast` number, since 6 + 8 + 6 + 571 + 54 + 21 = 666.

It is not a de Polignac number, because 6865715421 - 2¹ = 6865715419 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865715411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5325745 + ... + 5327033.

It is an arithmetic number, because the mean of its divisors is an integer number (226193760).

Almost surely, 2^6865715421 is an apocalyptic number.

It is an amenable number.

6865715421 is a deficient number, since it is larger than the sum of its proper divisors (3991585059).

6865715421 is a wasteful number, since it uses less digits than its factorization.

6865715421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466 (or 2463 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 6865715421 is about 82859.6127253803. The cubic root of 6865715421 is about 1900.6198735527.

The spelling of 6865715421 in words is "six billion, eight hundred sixty-five million, seven hundred fifteen thousand, four hundred twenty-one".