1111181805648 has 30 divisors (see below), whose sum is σ = 3109765748154. Its totient is φ = 370393935168.

The previous prime is 1111181805611. The next prime is 1111181805649. The reversal of 1111181805648 is 8465081811111.

1111181805648 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 1 + 8 + 1 + 80 + 564 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 719090432064 + 392091373584 = 847992^2 + 626172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111181805649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3858270015 + ... + 3858270302.

Almost surely, 2^{1111181805648} is an apocalyptic number.

1111181805648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1111181805648 is an abundant number, since it is smaller than the sum of its proper divisors (1998583942506).

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

1111181805648 is a wasteful number, since it uses less digits than its factorization.

1111181805648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716540331 (or 7716540322 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 45.

The spelling of 1111181805648 in words is "one trillion, one hundred eleven billion, one hundred eighty-one million, eight hundred five thousand, six hundred forty-eight".