6818376149 has 12 divisors (see below), whose sum is σ = 7484365476. Its totient is φ = 6207656832.

The previous prime is 6818376143. The next prime is 6818376193. The reversal of 6818376149 is 9416738186.

It can be written as a sum of positive squares in 6 ways, for example, as 1764588049 + 5053788100 = 42007^2 + 71090^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6818376149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6818376149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818376143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264002 + ... + 288675.

It is an arithmetic number, because the mean of its divisors is an integer number (623697123).

Almost surely, 2^6818376149 is an apocalyptic number.

It is an amenable number.

6818376149 is a deficient number, since it is larger than the sum of its proper divisors (665989327).

6818376149 is a wasteful number, since it uses less digits than its factorization.

6818376149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552776 (or 552763 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 6818376149 is about 82573.4591076334. The cubic root of 6818376149 is about 1896.2415219758.

The spelling of 6818376149 in words is "six billion, eight hundred eighteen million, three hundred seventy-six thousand, one hundred forty-nine".