54778405 has 16 divisors (see below), whose sum is σ = 71870400. Its totient is φ = 39749760.

The previous prime is 54778393. The next prime is 54778439. The reversal of 54778405 is 50487745.

54778405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-54778405 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 33241 + ... + 34849.

It is an arithmetic number, because the mean of its divisors is an integer number (4491900).

Almost surely, 2^54778405 is an apocalyptic number.

54778405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54778405 is a deficient number, since it is larger than the sum of its proper divisors (17091995).

54778405 is a wasteful number, since it uses less digits than its factorization.

54778405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 54778405 is about 7401.2434766058. The cubic root of 54778405 is about 379.7838221021.

The spelling of 54778405 in words is "fifty-four million, seven hundred seventy-eight thousand, four hundred five".