218450631126 has 32 divisors (see below), whose sum is σ = 537724631808. Its totient is φ = 57613353120.

The previous prime is 218450631101. The next prime is 218450631173. The reversal of 218450631126 is 621136054812.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200045820 + ... + 200046911.

It is an arithmetic number, because the mean of its divisors is an integer number (16803894744).

Almost surely, 2^218450631126 is an apocalyptic number.

218450631126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

218450631126 is an abundant number, since it is smaller than the sum of its proper divisors (319274000682).

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

218450631126 is a wasteful number, since it uses less digits than its factorization.

218450631126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400092756.

The product of its (nonzero) digits is 69120, while the sum is 39.

Adding to 218450631126 its reverse (621136054812), we get a palindrome (839586685938).

The spelling of 218450631126 in words is "two hundred eighteen billion, four hundred fifty million, six hundred thirty-one thousand, one hundred twenty-six".