55028687369 has 4 divisors (see below), whose sum is σ = 55930797060. Its totient is φ = 54126577680.

The previous prime is 55028687341. The next prime is 55028687381. The reversal of 55028687369 is 96378682055.

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 15397831744 + 39630855625 = 124088^2 + 199075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55028687369 is a prime.

It is a super-2 number, since 2×55028687369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55028689369) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 451054754 + ... + 451054875.

It is an arithmetic number, because the mean of its divisors is an integer number (13982699265).

Almost surely, 2^55028687369 is an apocalyptic number.

It is an amenable number.

55028687369 is a deficient number, since it is larger than the sum of its proper divisors (902109691).

55028687369 is an equidigital number, since it uses as much as digits as its factorization.

55028687369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902109690.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 55028687369 in words is "fifty-five billion, twenty-eight million, six hundred eighty-seven thousand, three hundred sixty-nine".