55130568997 has 18 divisors (see below), whose sum is σ = 64564077042. Its totient is φ = 46936247904.

The previous prime is 55130568973. The next prime is 55130569007. The reversal of 55130568997 is 79986503155.

It can be written as a sum of positive squares in 3 ways, for example, as 6935391841 + 48195177156 = 83279^2 + 219534^2 .

It is not a de Polignac number, because 55130568997 - 2¹¹ = 55130566949 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 (55130568197) 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 17 ways as a sum of consecutive naturals, for example, 20592823 + ... + 20595499.

It is an arithmetic number, because the mean of its divisors is an integer number (3586893169).

Almost surely, 2^55130568997 is an apocalyptic number.

It is an amenable number.

55130568997 is a deficient number, since it is larger than the sum of its proper divisors (9433508045).

55130568997 is an frugal number, since it uses more digits than its factorization.

55130568997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525 (or 2841 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 58.

The spelling of 55130568997 in words is "fifty-five billion, one hundred thirty million, five hundred sixty-eight thousand, nine hundred ninety-seven".