1181994840559 has 12 divisors (see below), whose sum is σ = 1281999632376. Its totient is φ = 1089292175712.

The previous prime is 1181994840527. The next prime is 1181994840569. The reversal of 1181994840559 is 9550484991811.

It is not a de Polignac number, because 1181994840559 - 2⁵ = 1181994840527 is a prime.

It is a super-2 number, since 2×1181994840559² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1181994840559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181994840569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5601177 + ... + 5808370.

It is an arithmetic number, because the mean of its divisors is an integer number (106833302698).

Almost surely, 2^{1181994840559} is an apocalyptic number.

1181994840559 is a deficient number, since it is larger than the sum of its proper divisors (100004791817).

1181994840559 is a wasteful number, since it uses less digits than its factorization.

1181994840559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11410186 (or 11410173 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 64.

The spelling of 1181994840559 in words is "one trillion, one hundred eighty-one billion, nine hundred ninety-four million, eight hundred forty thousand, five hundred fifty-nine".