423542126543 has 4 divisors (see below), whose sum is σ = 427654186128. Its totient is φ = 419430066960.

The previous prime is 423542126519. The next prime is 423542126591. The reversal of 423542126543 is 345621245324.

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 423542126543 - 2⁶ = 423542126479 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 423542126543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423542726543) 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, 2056029638 + ... + 2056029843.

It is an arithmetic number, because the mean of its divisors is an integer number (106913546532).

Almost surely, 2^423542126543 is an apocalyptic number.

423542126543 is a deficient number, since it is larger than the sum of its proper divisors (4112059585).

423542126543 is a wasteful number, since it uses less digits than its factorization.

423542126543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112059584.

The product of its digits is 691200, while the sum is 41.

The spelling of 423542126543 in words is "four hundred twenty-three billion, five hundred forty-two million, one hundred twenty-six thousand, five hundred forty-three".