1161543000000 has 392 divisors, whose sum is σ = 3856900943536. Its totient is φ = 308505600000.

The previous prime is 1161542999987. The next prime is 1161543000047. The reversal of 1161543000000 is 3451611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 938999382 + ... + 939000618.

Almost surely, 2^{1161543000000} is an apocalyptic number.

1161543000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161543000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928450471768).

1161543000000 is an abundant number, since it is smaller than the sum of its proper divisors (2695357943536).

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

1161543000000 is an frugal number, since it uses more digits than its factorization.

1161543000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 1161543000000 its reverse (3451611), we get a palindrome (1161546451611).

The spelling of 1161543000000 in words is "one trillion, one hundred sixty-one billion, five hundred forty-three million", and thus it is an aban number.