1042531643556 has 72 divisors (see below), whose sum is σ = 2840059602744. Its totient is φ = 320546488320.

The previous prime is 1042531643537. The next prime is 1042531643599. The reversal of 1042531643556 is 6553461352401.

It is a happy number.

1042531643556 is a `hidden beast` number, since 1 + 0 + 4 + 2 + 5 + 31 + 64 + 3 + 556 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1041998400 + 1041489645156 = 32280^2 + 1020534^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160221 + ... + 1452836.

Almost surely, 2^{1042531643556} is an apocalyptic number.

It is an amenable number.

1042531643556 is an abundant number, since it is smaller than the sum of its proper divisors (1797527959188).

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

1042531643556 is a wasteful number, since it uses less digits than its factorization.

1042531643556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614461 (or 1614456 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

Adding to 1042531643556 its reverse (6553461352401), we get a palindrome (7595992995957).

The spelling of 1042531643556 in words is "one trillion, forty-two billion, five hundred thirty-one million, six hundred forty-three thousand, five hundred fifty-six".