1543242423451 has 4 divisors (see below), whose sum is σ = 1564978232304. Its totient is φ = 1521506614600.

The previous prime is 1543242423431. The next prime is 1543242423467.

1543242423451 is nontrivially palindromic in base 10.

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 1543242423451 - 2²⁵ = 1543208869019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1543242423431) 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, 10867904320 + ... + 10867904461.

It is an arithmetic number, because the mean of its divisors is an integer number (391244558076).

Almost surely, 2^{1543242423451} is an apocalyptic number.

1543242423451 is a deficient number, since it is larger than the sum of its proper divisors (21735808853).

1543242423451 is an equidigital number, since it uses as much as digits as its factorization.

1543242423451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21735808852.

The product of its digits is 460800, while the sum is 40.

The spelling of 1543242423451 in words is "one trillion, five hundred forty-three billion, two hundred forty-two million, four hundred twenty-three thousand, four hundred fifty-one".