6865140544 has 28 divisors (see below), whose sum is σ = 13750344864. Its totient is φ = 3400486784.

The previous prime is 6865140539. The next prime is 6865140559. The reversal of 6865140544 is 4450415686.

It is a self number, because there is not a number n which added to its sum of digits gives 6865140544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494404 + ... + 508099.

Almost surely, 2^6865140544 is an apocalyptic number.

6865140544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6865140544 is an abundant number, since it is smaller than the sum of its proper divisors (6885204320).

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

6865140544 is a wasteful number, since it uses less digits than its factorization.

6865140544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002622 (or 1002612 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 6865140544 is about 82856.1436708226. The cubic root of 6865140544 is about 1900.5668247888.

The spelling of 6865140544 in words is "six billion, eight hundred sixty-five million, one hundred forty thousand, five hundred forty-four".