1183663841538 has 32 divisors (see below), whose sum is σ = 2417779759104. Its totient is φ = 386146513872.

The previous prime is 1183663841533. The next prime is 1183663841579. The reversal of 1183663841538 is 8351483663811.

It is not an unprimeable number, because it can be changed into a prime (1183663841533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11252181 + ... + 11356887.

It is an arithmetic number, because the mean of its divisors is an integer number (75555617472).

Almost surely, 2^{1183663841538} is an apocalyptic number.

1183663841538 is an abundant number, since it is smaller than the sum of its proper divisors (1234115917566).

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

1183663841538 is a wasteful number, since it uses less digits than its factorization.

1183663841538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144846.

The product of its digits is 9953280, while the sum is 57.

The spelling of 1183663841538 in words is "one trillion, one hundred eighty-three billion, six hundred sixty-three million, eight hundred forty-one thousand, five hundred thirty-eight".