46778181 has 8 divisors (see below), whose sum is σ = 63225600. Its totient is φ = 30758112.

The previous prime is 46778177. The next prime is 46778201. The reversal of 46778181 is 18187764.

It is a happy number.

46778181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 46778181 - 2² = 46778177 is a prime.

It is a super-2 number, since 2×46778181² = 4376396435337522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46778111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106581 + ... + 107018.

It is an arithmetic number, because the mean of its divisors is an integer number (7903200).

Almost surely, 2^46778181 is an apocalyptic number.

It is an amenable number.

46778181 is a deficient number, since it is larger than the sum of its proper divisors (16447419).

46778181 is a wasteful number, since it uses less digits than its factorization.

46778181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213675.

The product of its digits is 75264, while the sum is 42.

The square root of 46778181 is about 6839.4576539372. The cubic root of 46778181 is about 360.3139776249.

The spelling of 46778181 in words is "forty-six million, seven hundred seventy-eight thousand, one hundred eighty-one".