6855851437 has 2 divisors, whose sum is σ = 6855851438. Its totient is φ = 6855851436.

The previous prime is 6855851423. The next prime is 6855851467. The reversal of 6855851437 is 7341585586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3787910116 + 3067941321 = 61546^2 + 55389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6855851437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6855851467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427925718 + 3427925719.

It is an arithmetic number, because the mean of its divisors is an integer number (3427925719).

Almost surely, 2^6855851437 is an apocalyptic number.

It is an amenable number.

6855851437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855851437 is an equidigital number, since it uses as much as digits as its factorization.

6855851437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 52.

The square root of 6855851437 is about 82800.0690639809. The cubic root of 6855851437 is about 1899.7092294648.

The spelling of 6855851437 in words is "six billion, eight hundred fifty-five million, eight hundred fifty-one thousand, four hundred thirty-seven".