1043540445523 has 4 divisors (see below), whose sum is σ = 1043552244160. Its totient is φ = 1043528646888.

The previous prime is 1043540445511. The next prime is 1043540445617. The reversal of 1043540445523 is 3255440453401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1043540445523 - 2²¹ = 1043538348371 is a prime.

It is a super-2 number, since 2×1043540445523² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043540443523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5765640 + ... + 5943877.

It is an arithmetic number, because the mean of its divisors is an integer number (260888061040).

Almost surely, 2^{1043540445523} is an apocalyptic number.

1043540445523 is a deficient number, since it is larger than the sum of its proper divisors (11798637).

1043540445523 is an equidigital number, since it uses as much as digits as its factorization.

1043540445523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11798636.

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 1043540445523 its reverse (3255440453401), we get a palindrome (4298980898924).

The spelling of 1043540445523 in words is "one trillion, forty-three billion, five hundred forty million, four hundred forty-five thousand, five hundred twenty-three".