1213887741818 has 16 divisors (see below), whose sum is σ = 1826189530560. Its totient is φ = 605158428576.

The previous prime is 1213887741817. The next prime is 1213887741841. The reversal of 1213887741818 is 8181477883121.

It is not an unprimeable number, because it can be changed into a prime (1213887741817) 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 7 ways as a sum of consecutive naturals, for example, 4571630 + ... + 4829862.

It is an arithmetic number, because the mean of its divisors is an integer number (114136845660).

Almost surely, 2^{1213887741818} is an apocalyptic number.

1213887741818 is a deficient number, since it is larger than the sum of its proper divisors (612301788742).

1213887741818 is a wasteful number, since it uses less digits than its factorization.

1213887741818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265141.

The product of its digits is 4816896, while the sum is 59.

The spelling of 1213887741818 in words is "one trillion, two hundred thirteen billion, eight hundred eighty-seven million, seven hundred forty-one thousand, eight hundred eighteen".