55607120818 has 4 divisors (see below), whose sum is σ = 83410681230. Its totient is φ = 27803560408.

The previous prime is 55607120791. The next prime is 55607120837. The reversal of 55607120818 is 81802170655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81802170655 = 5 ⋅16360434131.

It can be written as a sum of positive squares in only one way, i.e., 30135918409 + 25471202409 = 173597^2 + 159597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13901780203 + ... + 13901780206.

Almost surely, 2^55607120818 is an apocalyptic number.

55607120818 is a deficient number, since it is larger than the sum of its proper divisors (27803560412).

55607120818 is a wasteful number, since it uses less digits than its factorization.

55607120818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27803560411.

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 55607120818 in words is "fifty-five billion, six hundred seven million, one hundred twenty thousand, eight hundred eighteen".