481539861 has 12 divisors (see below), whose sum is σ = 758790240. Its totient is φ = 291842280.

The previous prime is 481539853. The next prime is 481539889. The reversal of 481539861 is 168935184.

It is not a de Polignac number, because 481539861 - 2³ = 481539853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481539811) 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 11 ways as a sum of consecutive naturals, for example, 2431921 + ... + 2432118.

It is an arithmetic number, because the mean of its divisors is an integer number (63232520).

Almost surely, 2^481539861 is an apocalyptic number.

It is an amenable number.

481539861 is a deficient number, since it is larger than the sum of its proper divisors (277250379).

481539861 is a wasteful number, since it uses less digits than its factorization.

481539861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864056 (or 4864053 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 481539861 is about 21944.0165193157. The cubic root of 481539861 is about 783.8099056032.

The spelling of 481539861 in words is "four hundred eighty-one million, five hundred thirty-nine thousand, eight hundred sixty-one".