54856661 has 16 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 51313920.

The previous prime is 54856657. The next prime is 54856687. The reversal of 54856661 is 16665845.

It is a happy number.

54856661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 54856661 - 2² = 54856657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54856601) 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 15 ways as a sum of consecutive naturals, for example, 227501 + ... + 227741.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

Almost surely, 2^54856661 is an apocalyptic number.

It is an amenable number.

54856661 is a deficient number, since it is larger than the sum of its proper divisors (3687979).

54856661 is a wasteful number, since it uses less digits than its factorization.

54856661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its digits is 172800, while the sum is 41.

The square root of 54856661 is about 7406.5282690340. The cubic root of 54856661 is about 379.9645881128.

The spelling of 54856661 in words is "fifty-four million, eight hundred fifty-six thousand, six hundred sixty-one".