478642760181 has 6 divisors (see below), whose sum is σ = 691372875830. Its totient is φ = 319095173448.

The previous prime is 478642760173. The next prime is 478642760201. The reversal of 478642760181 is 181067246874.

478642760181 is a `hidden beast` number, since 4 + 7 + 8 + 6 + 4 + 27 + 601 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 470823779556 + 7818980625 = 686166^2 + 88425^2 .

It is not a de Polignac number, because 478642760181 - 2³ = 478642760173 is a prime.

It is a super-2 number, since 2×478642760181² (a number of 24 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 (478642760681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26591264446 + ... + 26591264463.

Almost surely, 2^478642760181 is an apocalyptic number.

It is an amenable number.

478642760181 is a deficient number, since it is larger than the sum of its proper divisors (212730115649).

478642760181 is a wasteful number, since it uses less digits than its factorization.

478642760181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53182528915 (or 53182528912 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 478642760181 in words is "four hundred seventy-eight billion, six hundred forty-two million, seven hundred sixty thousand, one hundred eighty-one".