55051320613 has 12 divisors (see below), whose sum is σ = 58308128748. Its totient is φ = 51968185920.

The previous prime is 55051320607. The next prime is 55051320671. The reversal of 55051320613 is 31602315055.

It can be written as a sum of positive squares in 2 ways, for example, as 17397082404 + 37654238209 = 131898^2 + 194047^2 .

It is not a de Polignac number, because 55051320613 - 2²¹ = 55049223461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55051320673) 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 11 ways as a sum of consecutive naturals, for example, 169906 + ... + 372787.

It is an arithmetic number, because the mean of its divisors is an integer number (4859010729).

Almost surely, 2^55051320613 is an apocalyptic number.

It is an amenable number.

55051320613 is a deficient number, since it is larger than the sum of its proper divisors (3256808135).

55051320613 is a wasteful number, since it uses less digits than its factorization.

55051320613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543012 (or 542993 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 55051320613 its reverse (31602315055), we get a palindrome (86653635668).

The spelling of 55051320613 in words is "fifty-five billion, fifty-one million, three hundred twenty thousand, six hundred thirteen".