55695351809 has 4 divisors (see below), whose sum is σ = 55705358340. Its totient is φ = 55685345280.

The previous prime is 55695351797. The next prime is 55695351841. The reversal of 55695351809 is 90815359655.

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 9442397584 + 46252954225 = 97172^2 + 215065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55695351809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55695351209) by changing a digit.

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, 4994912 + ... + 5006049.

It is an arithmetic number, because the mean of its divisors is an integer number (13926339585).

Almost surely, 2^55695351809 is an apocalyptic number.

It is an amenable number.

55695351809 is a deficient number, since it is larger than the sum of its proper divisors (10006531).

55695351809 is a wasteful number, since it uses less digits than its factorization.

55695351809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006530.

The product of its (nonzero) digits is 7290000, while the sum is 56.

It can be divided in two parts, 5569 and 5351809, that multiplied together give a square (29804224321 = 172639²).

The spelling of 55695351809 in words is "fifty-five billion, six hundred ninety-five million, three hundred fifty-one thousand, eight hundred nine".