55252752778 has 4 divisors (see below), whose sum is σ = 82879129170. Its totient is φ = 27626376388.

The previous prime is 55252752721. The next prime is 55252752833. The reversal of 55252752778 is 87725725255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37693057609 + 17559695169 = 194147^2 + 132513^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13813188193 + ... + 13813188196.

Almost surely, 2^55252752778 is an apocalyptic number.

55252752778 is a deficient number, since it is larger than the sum of its proper divisors (27626376392).

55252752778 is a wasteful number, since it uses less digits than its factorization.

55252752778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27626376391.

The product of its digits is 13720000, while the sum is 55.

The spelling of 55252752778 in words is "fifty-five billion, two hundred fifty-two million, seven hundred fifty-two thousand, seven hundred seventy-eight".