55264778 has 16 divisors (see below), whose sum is σ = 86217480. Its totient is φ = 26535936.

The previous prime is 55264771. The next prime is 55264789. The reversal of 55264778 is 87746255.

It can be written as a sum of positive squares in 4 ways, for example, as 40233649 + 15031129 = 6343^2 + 3877^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55264771) 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, 8726 + ... + 13662.

Almost surely, 2^55264778 is an apocalyptic number.

55264778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55264778 is a deficient number, since it is larger than the sum of its proper divisors (30952702).

55264778 is a wasteful number, since it uses less digits than its factorization.

55264778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161.

The product of its digits is 470400, while the sum is 44.

The square root of 55264778 is about 7434.0283830505. The cubic root of 55264778 is about 380.9045349280.

The spelling of 55264778 in words is "fifty-five million, two hundred sixty-four thousand, seven hundred seventy-eight".