1543542451453 has 4 divisors (see below), whose sum is σ = 1543545297760. Its totient is φ = 1543539605148.

The previous prime is 1543542451337. The next prime is 1543542451457. The reversal of 1543542451453 is 3541542453451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1543542451453 is a prime.

It is a super-2 number, since 2×1543542451453² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543542451457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329625 + ... + 1787662.

It is an arithmetic number, because the mean of its divisors is an integer number (385886324440).

Almost surely, 2^{1543542451453} is an apocalyptic number.

It is an amenable number.

1543542451453 is a deficient number, since it is larger than the sum of its proper divisors (2846307).

1543542451453 is an equidigital number, since it uses as much as digits as its factorization.

1543542451453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846306.

The product of its digits is 2880000, while the sum is 46.

The spelling of 1543542451453 in words is "one trillion, five hundred forty-three billion, five hundred forty-two million, four hundred fifty-one thousand, four hundred fifty-three".