1218155054047 has 8 divisors (see below), whose sum is σ = 1226886173856. Its totient is φ = 1209441039072.

The previous prime is 1218155054009. The next prime is 1218155054063. The reversal of 1218155054047 is 7404505518121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218155054047 - 2¹⁹ = 1218154529759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1218155053994 and 1218155054012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218155054647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4133248 + ... + 4418149.

It is an arithmetic number, because the mean of its divisors is an integer number (153360771732).

Almost surely, 2^{1218155054047} is an apocalyptic number.

1218155054047 is a deficient number, since it is larger than the sum of its proper divisors (8731119809).

1218155054047 is an equidigital number, since it uses as much as digits as its factorization.

1218155054047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552417.

The product of its (nonzero) digits is 224000, while the sum is 43.

The spelling of 1218155054047 in words is "one trillion, two hundred eighteen billion, one hundred fifty-five million, fifty-four thousand, forty-seven".