54644781 has 8 divisors (see below), whose sum is σ = 72969120. Its totient is φ = 36375152.

The previous prime is 54644773. The next prime is 54644801. The reversal of 54644781 is 18744645.

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

It is a cyclic number.

It is not a de Polignac number, because 54644781 - 2³ = 54644773 is a prime.

It is a super-2 number, since 2×54644781² = 5972104181075922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54644761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11286 + ... + 15383.

It is an arithmetic number, because the mean of its divisors is an integer number (9121140).

Almost surely, 2^54644781 is an apocalyptic number.

It is an amenable number.

54644781 is a deficient number, since it is larger than the sum of its proper divisors (18324339).

54644781 is a wasteful number, since it uses less digits than its factorization.

54644781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27355.

The product of its digits is 107520, while the sum is 39.

The square root of 54644781 is about 7392.2108330323. The cubic root of 54644781 is about 379.4747614191.

The spelling of 54644781 in words is "fifty-four million, six hundred forty-four thousand, seven hundred eighty-one".