1218451878386 has 8 divisors (see below), whose sum is σ = 1837888308720. Its totient is φ = 605822442148.

The previous prime is 1218451878373. The next prime is 1218451878401. The reversal of 1218451878386 is 6838781548121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701748076 + ... + 1701748791.

It is an arithmetic number, because the mean of its divisors is an integer number (229736038590).

Almost surely, 2^{1218451878386} is an apocalyptic number.

1218451878386 is a deficient number, since it is larger than the sum of its proper divisors (619436430334).

1218451878386 is a wasteful number, since it uses less digits than its factorization.

1218451878386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403497048.

The product of its digits is 20643840, while the sum is 62.

The spelling of 1218451878386 in words is "one trillion, two hundred eighteen billion, four hundred fifty-one million, eight hundred seventy-eight thousand, three hundred eighty-six".