6859872540 has 72 divisors (see below), whose sum is σ = 20821233888. Its totient is φ = 1828160640.

The previous prime is 6859872511. The next prime is 6859872571. The reversal of 6859872540 is 452789586.

6859872540 is a `hidden beast` number, since 6 + 8 + 5 + 98 + 7 + 2 + 540 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300945 + ... + 322935.

It is an arithmetic number, because the mean of its divisors is an integer number (289183804).

Almost surely, 2^6859872540 is an apocalyptic number.

6859872540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6859872540 is an abundant number, since it is smaller than the sum of its proper divisors (13961361348).

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

6859872540 is a wasteful number, since it uses less digits than its factorization.

6859872540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23739 (or 23734 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The square root of 6859872540 is about 82824.3475072397. The cubic root of 6859872540 is about 1900.0805635276.

The spelling of 6859872540 in words is "six billion, eight hundred fifty-nine million, eight hundred seventy-two thousand, five hundred forty".