1218976800815 has 8 divisors (see below), whose sum is σ = 1548817582320. Its totient is φ = 917817826432.

The previous prime is 1218976800809. The next prime is 1218976800829. The reversal of 1218976800815 is 5180086798121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218976800815 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7170451685 + ... + 7170451854.

It is an arithmetic number, because the mean of its divisors is an integer number (193602197790).

Almost surely, 2^{1218976800815} is an apocalyptic number.

1218976800815 is a deficient number, since it is larger than the sum of its proper divisors (329840781505).

1218976800815 is a wasteful number, since it uses less digits than its factorization.

1218976800815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14340903561.

The product of its (nonzero) digits is 1935360, while the sum is 56.

The spelling of 1218976800815 in words is "one trillion, two hundred eighteen billion, nine hundred seventy-six million, eight hundred thousand, eight hundred fifteen".