423981518709 has 16 divisors (see below), whose sum is σ = 646131765888. Its totient is φ = 242250894912.

The previous prime is 423981518689. The next prime is 423981518731. The reversal of 423981518709 is 907815189324.

It is not a de Polignac number, because 423981518709 - 2⁹ = 423981518197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423981518749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794982 + ... + 1216535.

It is an arithmetic number, because the mean of its divisors is an integer number (40383235368).

Almost surely, 2^423981518709 is an apocalyptic number.

It is an amenable number.

423981518709 is a deficient number, since it is larger than the sum of its proper divisors (222150247179).

423981518709 is a wasteful number, since it uses less digits than its factorization.

423981518709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021564.

The product of its (nonzero) digits is 4354560, while the sum is 57.

It can be divided in two parts, 4239815 and 18709, that added together give a palindrome (4258524).

The spelling of 423981518709 in words is "four hundred twenty-three billion, nine hundred eighty-one million, five hundred eighteen thousand, seven hundred nine".