421557062423 has 16 divisors (see below), whose sum is σ = 488302848000. Its totient is φ = 356460616512.

The previous prime is 421557062417. The next prime is 421557062431. The reversal of 421557062423 is 324260755124.

It is not a de Polignac number, because 421557062423 - 2¹⁰ = 421557061399 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 (421557062453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497183 + ... + 1044176.

It is an arithmetic number, because the mean of its divisors is an integer number (30518928000).

Almost surely, 2^421557062423 is an apocalyptic number.

421557062423 is a deficient number, since it is larger than the sum of its proper divisors (66745785577).

421557062423 is a wasteful number, since it uses less digits than its factorization.

421557062423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541894.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 421557062423 in words is "four hundred twenty-one billion, five hundred fifty-seven million, sixty-two thousand, four hundred twenty-three".