55312732709 has 4 divisors (see below), whose sum is σ = 59567558316. Its totient is φ = 51057907104.

The previous prime is 55312732627. The next prime is 55312732711. The reversal of 55312732709 is 90723721355.

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 35098149025 + 20214583684 = 187345^2 + 142178^2 .

It is a cyclic number.

It is not a de Polignac number, because 55312732709 - 2³² = 51017765413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55312732709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55312732309) 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, 2127412784 + ... + 2127412809.

It is an arithmetic number, because the mean of its divisors is an integer number (14891889579).

Almost surely, 2^55312732709 is an apocalyptic number.

It is an amenable number.

55312732709 is a deficient number, since it is larger than the sum of its proper divisors (4254825607).

55312732709 is a wasteful number, since it uses less digits than its factorization.

55312732709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254825606.

The product of its (nonzero) digits is 396900, while the sum is 44.

The spelling of 55312732709 in words is "fifty-five billion, three hundred twelve million, seven hundred thirty-two thousand, seven hundred nine".