55778837 has 2 divisors, whose sum is σ = 55778838. Its totient is φ = 55778836.

The previous prime is 55778831. The next prime is 55778867. The reversal of 55778837 is 73887755.

55778837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43112356 + 12666481 = 6566^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 55778837 - 2¹⁴ = 55762453 is a prime.

It is a super-2 number, since 2×55778837² = 6222557314145138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55778831) 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 as a sum of consecutive naturals, namely, 27889418 + 27889419.

It is an arithmetic number, because the mean of its divisors is an integer number (27889419).

Almost surely, 2^55778837 is an apocalyptic number.

It is an amenable number.

55778837 is a deficient number, since it is larger than the sum of its proper divisors (1).

55778837 is an equidigital number, since it uses as much as digits as its factorization.

55778837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1646400, while the sum is 50.

The square root of 55778837 is about 7468.5230802348. The cubic root of 55778837 is about 382.0819177773.

The spelling of 55778837 in words is "fifty-five million, seven hundred seventy-eight thousand, eight hundred thirty-seven".