423939618321 has 4 divisors (see below), whose sum is σ = 565252824432. Its totient is φ = 282626412212.

The previous prime is 423939618301. The next prime is 423939618343. The reversal of 423939618321 is 123816939324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423939618321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423939618301) 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 3 ways as a sum of consecutive naturals, for example, 70656603051 + ... + 70656603056.

It is an arithmetic number, because the mean of its divisors is an integer number (141313206108).

Almost surely, 2^423939618321 is an apocalyptic number.

It is an amenable number.

423939618321 is a deficient number, since it is larger than the sum of its proper divisors (141313206111).

423939618321 is a wasteful number, since it uses less digits than its factorization.

423939618321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141313206110.

The product of its digits is 1679616, while the sum is 51.

The spelling of 423939618321 in words is "four hundred twenty-three billion, nine hundred thirty-nine million, six hundred eighteen thousand, three hundred twenty-one".