55311551545 has 4 divisors (see below), whose sum is σ = 66373861860. Its totient is φ = 44249241232.

The previous prime is 55311551539. The next prime is 55311551573. The reversal of 55311551545 is 54515511355.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33921904041 + 21389647504 = 184179^2 + 146252^2 .

It is a cyclic number.

It is not a de Polignac number, because 55311551545 - 2⁵ = 55311551513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55311551498 and 55311551507.

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 in 3 ways as a sum of consecutive naturals, for example, 5531155150 + ... + 5531155159.

It is an arithmetic number, because the mean of its divisors is an integer number (16593465465).

Almost surely, 2^55311551545 is an apocalyptic number.

It is an amenable number.

55311551545 is a deficient number, since it is larger than the sum of its proper divisors (11062310315).

55311551545 is a wasteful number, since it uses less digits than its factorization.

55311551545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062310314.

The product of its digits is 187500, while the sum is 40.

The spelling of 55311551545 in words is "fifty-five billion, three hundred eleven million, five hundred fifty-one thousand, five hundred forty-five".