6905405818 has 16 divisors (see below), whose sum is σ = 10810120680. Its totient is φ = 3304139776.

The previous prime is 6905405813. The next prime is 6905405861. The reversal of 6905405818 is 8185045096.

6905405818 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5940247329 + 965158489 = 77073^2 + 31067^2 .

It is a super-2 number, since 2×6905405818² = 95369259022536498248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6905405813) 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, 520255 + ... + 533362.

Almost surely, 2^6905405818 is an apocalyptic number.

6905405818 is a deficient number, since it is larger than the sum of its proper divisors (3904714862).

6905405818 is a wasteful number, since it uses less digits than its factorization.

6905405818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053761.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 6905405818 is about 83098.7714590294. The cubic root of 6905405818 is about 1904.2753050715.

The spelling of 6905405818 in words is "six billion, nine hundred five million, four hundred five thousand, eight hundred eighteen".