1216300455238 has 24 divisors (see below), whose sum is σ = 2005476313176. Its totient is φ = 552839480160.

The previous prime is 1216300455233. The next prime is 1216300455269. The reversal of 1216300455238 is 8325540036121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216300455238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216300455233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6113506 + ... + 6309322.

It is an arithmetic number, because the mean of its divisors is an integer number (83561513049).

Almost surely, 2^{1216300455238} is an apocalyptic number.

1216300455238 is a deficient number, since it is larger than the sum of its proper divisors (789175857938).

1216300455238 is a wasteful number, since it uses less digits than its factorization.

1216300455238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221508 (or 221497 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1216300455238 in words is "one trillion, two hundred sixteen billion, three hundred million, four hundred fifty-five thousand, two hundred thirty-eight".