1218669146856 has 128 divisors (see below), whose sum is σ = 3869073734400. Its totient is φ = 348165734400.

The previous prime is 1218669146833. The next prime is 1218669146869. The reversal of 1218669146856 is 6586419668121.

1218669146856 is a `hidden beast` number, since 1 + 2 + 1 + 86 + 6 + 91 + 468 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1218669146793 and 1218669146802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32642056 + ... + 32679368.

It is an arithmetic number, because the mean of its divisors is an integer number (30227138550).

Almost surely, 2^{1218669146856} is an apocalyptic number.

It is an amenable number.

1218669146856 is an abundant number, since it is smaller than the sum of its proper divisors (2650404587544).

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

1218669146856 is a wasteful number, since it uses less digits than its factorization.

1218669146856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58936 (or 58926 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 1218669146856 in words is "one trillion, two hundred eighteen billion, six hundred sixty-nine million, one hundred forty-six thousand, eight hundred fifty-six".