1218175804441 has 16 divisors (see below), whose sum is σ = 1235652485760. Its totient is φ = 1200852984960.

The previous prime is 1218175804411. The next prime is 1218175804477. The reversal of 1218175804441 is 1444085718121.

It is a cyclic number.

It is not a de Polignac number, because 1218175804441 - 2²³ = 1218167415833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1218175804391 and 1218175804400.

It is not an unprimeable number, because it can be changed into a prime (1218175804411) 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, 11260036 + ... + 11367706.

It is an arithmetic number, because the mean of its divisors is an integer number (77228280360).

Almost surely, 2^{1218175804441} is an apocalyptic number.

It is an amenable number.

1218175804441 is a deficient number, since it is larger than the sum of its proper divisors (17476681319).

1218175804441 is a wasteful number, since it uses less digits than its factorization.

1218175804441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108384.

The product of its (nonzero) digits is 286720, while the sum is 46.

The spelling of 1218175804441 in words is "one trillion, two hundred eighteen billion, one hundred seventy-five million, eight hundred four thousand, four hundred forty-one".