55648791779 has 4 divisors (see below), whose sum is σ = 63598619184. Its totient is φ = 47698964376.

The previous prime is 55648791773. The next prime is 55648791791. The reversal of 55648791779 is 97719784655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97719784655 = 5 ⋅19543956931.

It is a de Polignac number, because none of the positive numbers 2^k-55648791779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55648791773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3974913692 + ... + 3974913705.

It is an arithmetic number, because the mean of its divisors is an integer number (15899654796).

Almost surely, 2^55648791779 is an apocalyptic number.

55648791779 is a deficient number, since it is larger than the sum of its proper divisors (7949827405).

55648791779 is an equidigital number, since it uses as much as digits as its factorization.

55648791779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949827404.

The product of its digits is 133358400, while the sum is 68.

The spelling of 55648791779 in words is "fifty-five billion, six hundred forty-eight million, seven hundred ninety-one thousand, seven hundred seventy-nine".