473381821368181 has 4 divisors (see below), whose sum is σ = 516416532401664. Its totient is φ = 430347110334700.

The previous prime is 473381821368173. The next prime is 473381821368187. The reversal of 473381821368181 is 181863128183374.

It is a happy number.

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 not a de Polignac number, because 473381821368181 - 2³ = 473381821368173 is a prime.

It is a super-2 number, since 2×473381821368181² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (473381821368187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21517355516725 + ... + 21517355516746.

It is an arithmetic number, because the mean of its divisors is an integer number (129104133100416).

Almost surely, 2^{473381821368181} is an apocalyptic number.

It is an amenable number.

473381821368181 is a deficient number, since it is larger than the sum of its proper divisors (43034711033483).

473381821368181 is a wasteful number, since it uses less digits than its factorization.

473381821368181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43034711033482.

The product of its digits is 37158912, while the sum is 64.

The spelling of 473381821368181 in words is "four hundred seventy-three trillion, three hundred eighty-one billion, eight hundred twenty-one million, three hundred sixty-eight thousand, one hundred eighty-one".