1218282635856 has 320 divisors, whose sum is σ = 3856630659840. Its totient is φ = 329020876800.

The previous prime is 1218282635797. The next prime is 1218282635879. The reversal of 1218282635856 is 6585362828121.

It is a junction number, because it is equal to n+sod(n) for n = 1218282635796 and 1218282635805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24060486 + ... + 24111066.

It is an arithmetic number, because the mean of its divisors is an integer number (12051970812).

Almost surely, 2^{1218282635856} is an apocalyptic number.

1218282635856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218282635856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928315329920).

1218282635856 is an abundant number, since it is smaller than the sum of its proper divisors (2638348023984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218282635856 is a wasteful number, since it uses less digits than its factorization.

1218282635856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50667 (or 50639 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 57.

The spelling of 1218282635856 in words is "one trillion, two hundred eighteen billion, two hundred eighty-two million, six hundred thirty-five thousand, eight hundred fifty-six".