421405542543 has 8 divisors (see below), whose sum is σ = 562219406848. Its totient is φ = 280764353304.

The previous prime is 421405542511. The next prime is 421405542587. The reversal of 421405542543 is 345245504124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421405542543 - 2⁵ = 421405542511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421405544543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43163071 + ... + 43172832.

It is an arithmetic number, because the mean of its divisors is an integer number (70277425856).

Almost surely, 2^421405542543 is an apocalyptic number.

421405542543 is a deficient number, since it is larger than the sum of its proper divisors (140813864305).

421405542543 is a wasteful number, since it uses less digits than its factorization.

421405542543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86337533.

The product of its (nonzero) digits is 384000, while the sum is 39.

The spelling of 421405542543 in words is "four hundred twenty-one billion, four hundred five million, five hundred forty-two thousand, five hundred forty-three".