1118180043681 has 16 divisors (see below), whose sum is σ = 1494172429824. Its totient is φ = 743821691904.

The previous prime is 1118180043667. The next prime is 1118180043733. The reversal of 1118180043681 is 1863400818111.

It is not a de Polignac number, because 1118180043681 - 2¹⁴ = 1118180027297 is a prime.

It is a super-2 number, since 2×1118180043681² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1118180543681) 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, 3673971 + ... + 3966663.

It is an arithmetic number, because the mean of its divisors is an integer number (93385776864).

Almost surely, 2^{1118180043681} is an apocalyptic number.

It is an amenable number.

1118180043681 is a deficient number, since it is larger than the sum of its proper divisors (375992386143).

1118180043681 is a wasteful number, since it uses less digits than its factorization.

1118180043681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295480.

The product of its (nonzero) digits is 36864, while the sum is 42.

The spelling of 1118180043681 in words is "one trillion, one hundred eighteen billion, one hundred eighty million, forty-three thousand, six hundred eighty-one".