218550578039 has 2 divisors, whose sum is σ = 218550578040. Its totient is φ = 218550578038.

The previous prime is 218550577997. The next prime is 218550578093. The reversal of 218550578039 is 930875055812.

Together with next prime (218550578093) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218550578039 - 2⁸ = 218550577783 is a prime.

It is a super-2 number, since 2×218550578039² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218550578339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109275289019 + 109275289020.

It is an arithmetic number, because the mean of its divisors is an integer number (109275289020).

Almost surely, 2^218550578039 is an apocalyptic number.

218550578039 is a deficient number, since it is larger than the sum of its proper divisors (1).

218550578039 is an equidigital number, since it uses as much as digits as its factorization.

218550578039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 218550578039 in words is "two hundred eighteen billion, five hundred fifty million, five hundred seventy-eight thousand, thirty-nine".