218603356057 has 4 divisors (see below), whose sum is σ = 218609905936. Its totient is φ = 218596806180.

The previous prime is 218603356009. The next prime is 218603356061. The reversal of 218603356057 is 750653306812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218603356057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218603355998 and 218603356016.

It is not an unprimeable number, because it can be changed into a prime (218603356357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3224619 + ... + 3291712.

It is an arithmetic number, because the mean of its divisors is an integer number (54652476484).

Almost surely, 2^218603356057 is an apocalyptic number.

It is an amenable number.

218603356057 is a deficient number, since it is larger than the sum of its proper divisors (6549879).

218603356057 is an equidigital number, since it uses as much as digits as its factorization.

218603356057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6549878.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 218603356057 in words is "two hundred eighteen billion, six hundred three million, three hundred fifty-six thousand, fifty-seven".