6856641562625 has 32 divisors (see below), whose sum is σ = 9188058956544. Its totient is φ = 5089934304000.

The previous prime is 6856641562543. The next prime is 6856641562651. The reversal of 6856641562625 is 5262651466586.

It is a de Polignac number, because none of the positive numbers 2^k-6856641562625 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22572047 + ... + 22873796.

It is an arithmetic number, because the mean of its divisors is an integer number (287126842392).

Almost surely, 2^{6856641562625} is an apocalyptic number.

It is an amenable number.

6856641562625 is a deficient number, since it is larger than the sum of its proper divisors (2331417393919).

6856641562625 is a wasteful number, since it uses less digits than its factorization.

6856641562625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45445946 (or 45445936 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 62.

The spelling of 6856641562625 in words is "six trillion, eight hundred fifty-six billion, six hundred forty-one million, five hundred sixty-two thousand, six hundred twenty-five".