6405000218 has 8 divisors (see below), whose sum is σ = 9867162612. Its totient is φ = 3115946016.

The previous prime is 6405000211. The next prime is 6405000221. The reversal of 6405000218 is 8120005046.

It can be written as a sum of positive squares in 2 ways, for example, as 6242106049 + 162894169 = 79007^2 + 12763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6405000211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43276955 + ... + 43277102.

Almost surely, 2^6405000218 is an apocalyptic number.

6405000218 is the 42779-th centered heptagonal number.

6405000218 is a deficient number, since it is larger than the sum of its proper divisors (3462162394).

6405000218 is a wasteful number, since it uses less digits than its factorization.

6405000218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86554096.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 6405000218 is about 80031.2452608355. The cubic root of 6405000218 is about 1857.1189274950.

The spelling of 6405000218 in words is "six billion, four hundred five million, two hundred eighteen", and thus it is an aban number.