218306253152644 has 36 divisors (see below), whose sum is σ = 402554130906816. Its totient is φ = 103393674521808.

The previous prime is 218306253152599. The next prime is 218306253152657. The reversal of 218306253152644 is 446251352603812.

It is a junction number, because it is equal to n+sod(n) for n = 218306253152591 and 218306253152600.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110857984 + ... + 112810039.

It is an arithmetic number, because the mean of its divisors is an integer number (11182059191856).

Almost surely, 2^{218306253152644} is an apocalyptic number.

It is an amenable number.

218306253152644 is a deficient number, since it is larger than the sum of its proper divisors (184247877754172).

218306253152644 is a wasteful number, since it uses less digits than its factorization.

218306253152644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223668256 (or 223668151 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 218306253152644 in words is "two hundred eighteen trillion, three hundred six billion, two hundred fifty-three million, one hundred fifty-two thousand, six hundred forty-four".