218607126138 has 36 divisors (see below), whose sum is σ = 503149400910. Its totient is φ = 68582626176.

The previous prime is 218607126113. The next prime is 218607126139. The reversal of 218607126138 is 831621706812.

218607126138 is a `hidden beast` number, since 2 + 1 + 8 + 607 + 1 + 2 + 6 + 1 + 38 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 212914876329 + 5692249809 = 461427^2 + 75447^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 218607126093 and 218607126102.

It is not an unprimeable number, because it can be changed into a prime (218607126139) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21006633 + ... + 21017036.

Almost surely, 2^218607126138 is an apocalyptic number.

218607126138 is an abundant number, since it is smaller than the sum of its proper divisors (284542274772).

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

218607126138 is a wasteful number, since it uses less digits than its factorization.

218607126138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42023711 (or 42023691 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 218607126138 in words is "two hundred eighteen billion, six hundred seven million, one hundred twenty-six thousand, one hundred thirty-eight".