6856469145 has 24 divisors (see below), whose sum is σ = 11950221192. Its totient is φ = 3636576000.

The previous prime is 6856469099. The next prime is 6856469161. The reversal of 6856469145 is 5419646586.

6856469145 is a `hidden beast` number, since 6 + 8 + 564 + 69 + 14 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32387481 + 6824081664 = 5691^2 + 82608^2 .

It is not a de Polignac number, because 6856469145 - 2¹³ = 6856460953 is a prime.

It is a super-2 number, since 2×6856469145² = 94022338272674062050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6856469091 and 6856469100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412756 + ... + 429045.

It is an arithmetic number, because the mean of its divisors is an integer number (497925883).

Almost surely, 2^6856469145 is an apocalyptic number.

It is an amenable number.

6856469145 is a deficient number, since it is larger than the sum of its proper divisors (5093752047).

6856469145 is a wasteful number, since it uses less digits than its factorization.

6856469145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841993 (or 841990 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 6856469145 is about 82803.7990976259. The cubic root of 6856469145 is about 1899.7662819626.

The spelling of 6856469145 in words is "six billion, eight hundred fifty-six million, four hundred sixty-nine thousand, one hundred forty-five".