218306253152744 has 8 divisors (see below), whose sum is σ = 409324224661410. Its totient is φ = 109153126576368.

The previous prime is 218306253152707. The next prime is 218306253152791. The reversal of 218306253152744 is 447251352603812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 159019918296100 + 59286334856644 = 12610310^2 + 7699762^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13644140822039 + ... + 13644140822054.

Almost surely, 2^{218306253152744} is an apocalyptic number.

It is an amenable number.

218306253152744 is a deficient number, since it is larger than the sum of its proper divisors (191017971508666).

218306253152744 is a wasteful number, since it uses less digits than its factorization.

218306253152744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27288281644099 (or 27288281644095 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 218306253152744 in words is "two hundred eighteen trillion, three hundred six billion, two hundred fifty-three million, one hundred fifty-two thousand, seven hundred forty-four".