1118181197640 has 64 divisors (see below), whose sum is σ = 3612585412800. Its totient is φ = 275244602112.

The previous prime is 1118181197633. The next prime is 1118181197641. The reversal of 1118181197640 is 467911818111.

It is a self number, because there is not a number n which added to its sum of digits gives 1118181197640.

It is not an unprimeable number, because it can be changed into a prime (1118181197641) 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, 358389850 + ... + 358392969.

It is an arithmetic number, because the mean of its divisors is an integer number (56446647075).

Almost surely, 2^{1118181197640} is an apocalyptic number.

1118181197640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118181197640 is an abundant number, since it is smaller than the sum of its proper divisors (2494404215160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1118181197640 is a wasteful number, since it uses less digits than its factorization.

1118181197640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716782846 (or 716782842 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 48.

The spelling of 1118181197640 in words is "one trillion, one hundred eighteen billion, one hundred eighty-one million, one hundred ninety-seven thousand, six hundred forty".