423171719918 has 4 divisors (see below), whose sum is σ = 634757579880. Its totient is φ = 211585859958.

The previous prime is 423171719897. The next prime is 423171719939. The reversal of 423171719918 is 819917171324.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (423171719897) and next prime (423171719939).

It is a super-3 number, since 3×423171719918³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 423171719918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105792929978 + ... + 105792929981.

It is an arithmetic number, because the mean of its divisors is an integer number (158689394970).

Almost surely, 2^423171719918 is an apocalyptic number.

423171719918 is a deficient number, since it is larger than the sum of its proper divisors (211585859962).

423171719918 is a wasteful number, since it uses less digits than its factorization.

423171719918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211585859961.

The product of its digits is 762048, while the sum is 53.

The spelling of 423171719918 in words is "four hundred twenty-three billion, one hundred seventy-one million, seven hundred nineteen thousand, nine hundred eighteen".