6857268149 has 2 divisors, whose sum is σ = 6857268150. Its totient is φ = 6857268148.

The previous prime is 6857268137. The next prime is 6857268199. The reversal of 6857268149 is 9418627586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6398880049 + 458388100 = 79993^2 + 21410^2 .

It is a cyclic number.

It is not a de Polignac number, because 6857268149 - 2²⁸ = 6588832693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6857268094 and 6857268103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6857268199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428634074 + 3428634075.

It is an arithmetic number, because the mean of its divisors is an integer number (3428634075).

Almost surely, 2^6857268149 is an apocalyptic number.

It is an amenable number.

6857268149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6857268149 is an equidigital number, since it uses as much as digits as its factorization.

6857268149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 56.

The square root of 6857268149 is about 82808.6236390873. The cubic root of 6857268149 is about 1899.8400741661.

The spelling of 6857268149 in words is "six billion, eight hundred fifty-seven million, two hundred sixty-eight thousand, one hundred forty-nine".