54778881 has 8 divisors (see below), whose sum is σ = 76882720. Its totient is φ = 34597152.

The previous prime is 54778873. The next prime is 54778901. The reversal of 54778881 is 18887745.

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

It is not a de Polignac number, because 54778881 - 2³ = 54778873 is a prime.

It is a super-2 number, since 2×54778881² = 6001451607224322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54778881.

It is not an unprimeable number, because it can be changed into a prime (54778831) 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, 480460 + ... + 480573.

It is an arithmetic number, because the mean of its divisors is an integer number (9610340).

Almost surely, 2^54778881 is an apocalyptic number.

It is an amenable number.

54778881 is a deficient number, since it is larger than the sum of its proper divisors (22103839).

54778881 is a wasteful number, since it uses less digits than its factorization.

54778881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961055.

The product of its digits is 501760, while the sum is 48.

The square root of 54778881 is about 7401.2756332946. The cubic root of 54778881 is about 379.7849221498.

The spelling of 54778881 in words is "fifty-four million, seven hundred seventy-eight thousand, eight hundred eighty-one".