4218698278809 has 81 divisors (see below), whose sum is σ = 7246072460991. Its totient is φ = 2358259787520.

The previous prime is 4218698278799. The next prime is 4218698278871. The reversal of 4218698278809 is 9088728968124.

The square root of 4218698278809 is 2053947.

It is a perfect power (a square), and thus also a powerful number.

4218698278809 is a `hidden beast` number, since 4 + 218 + 69 + 8 + 278 + 80 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1598573336409 + 2620124942400 = 1264347^2 + 1618680^2 .

It is not a de Polignac number, because 4218698278809 - 2¹⁷ = 4218698147737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4218698278009) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2027244649 + ... + 2027246729.

Almost surely, 2^{4218698278809} is an apocalyptic number.

4218698278809 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

4218698278809 is the 2053947-th square number.

4218698278809 is the 1026974-th centered octagonal number.

It is an amenable number.

4218698278809 is a deficient number, since it is larger than the sum of its proper divisors (3027374182182).

4218698278809 is an frugal number, since it uses more digits than its factorization.

4218698278809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 72.

The spelling of 4218698278809 in words is "four trillion, two hundred eighteen billion, six hundred ninety-eight million, two hundred seventy-eight thousand, eight hundred nine".