1142543661804 has 144 divisors (see below), whose sum is σ = 2951589732000. Its totient is φ = 372550026240.

The previous prime is 1142543661797. The next prime is 1142543661817. The reversal of 1142543661804 is 4081663452411.

1142543661804 is a `hidden beast` number, since 1 + 1 + 4 + 25 + 4 + 3 + 6 + 618 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1142543661804.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 323756712 + ... + 323760240.

Almost surely, 2^{1142543661804} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142543661804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475794866000).

1142543661804 is an abundant number, since it is smaller than the sum of its proper divisors (1809046070196).

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

1142543661804 is a wasteful number, since it uses less digits than its factorization.

1142543661804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368 (or 4363 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 1142543661804 in words is "one trillion, one hundred forty-two billion, five hundred forty-three million, six hundred sixty-one thousand, eight hundred four".