1020140451543 has 4 divisors (see below), whose sum is σ = 1360187268728. Its totient is φ = 680093634360.

The previous prime is 1020140451527. The next prime is 1020140451581. The reversal of 1020140451543 is 3451540410201.

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

It is not a de Polignac number, because 1020140451543 - 2⁴ = 1020140451527 is a prime.

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 1020140451543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020140452543) 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, 170023408588 + ... + 170023408593.

It is an arithmetic number, because the mean of its divisors is an integer number (340046817182).

Almost surely, 2^{1020140451543} is an apocalyptic number.

1020140451543 is a deficient number, since it is larger than the sum of its proper divisors (340046817185).

1020140451543 is an equidigital number, since it uses as much as digits as its factorization.

1020140451543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340046817184.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1020140451543 its reverse (3451540410201), we get a palindrome (4471680861744).

The spelling of 1020140451543 in words is "one trillion, twenty billion, one hundred forty million, four hundred fifty-one thousand, five hundred forty-three".