1218554653019 has 16 divisors (see below), whose sum is σ = 1331172445920. Its totient is φ = 1106244034560.

The previous prime is 1218554653009. The next prime is 1218554653061. The reversal of 1218554653019 is 9103564558121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218554653019 is a prime.

It is a super-2 number, since 2×1218554653019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218554653009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83495387 + ... + 83509979.

It is an arithmetic number, because the mean of its divisors is an integer number (83198277870).

Almost surely, 2^{1218554653019} is an apocalyptic number.

1218554653019 is a deficient number, since it is larger than the sum of its proper divisors (112617792901).

1218554653019 is a wasteful number, since it uses less digits than its factorization.

1218554653019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24590.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 1218554653019 in words is "one trillion, two hundred eighteen billion, five hundred fifty-four million, six hundred fifty-three thousand, nineteen".