6853977918 has 16 divisors (see below), whose sum is σ = 15231062160. Its totient is φ = 2284659288.

The previous prime is 6853977917. The next prime is 6853977919. The reversal of 6853977918 is 8197793586.

6853977918 is a `hidden beast` number, since 6 + 8 + 539 + 7 + 7 + 91 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (6853977917) and next prime (6853977919).

It is a super-2 number, since 2×6853977918² = 93954026600863229448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6853977917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63462705 + ... + 63462812.

It is an arithmetic number, because the mean of its divisors is an integer number (951941385).

Almost surely, 2^6853977918 is an apocalyptic number.

6853977918 is an abundant number, since it is smaller than the sum of its proper divisors (8377084242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6853977918 is a wasteful number, since it uses less digits than its factorization.

6853977918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126925528 (or 126925522 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 6853977918 is about 82788.7547798613. The cubic root of 6853977918 is about 1899.5361672943.

The spelling of 6853977918 in words is "six billion, eight hundred fifty-three million, nine hundred seventy-seven thousand, nine hundred eighteen".