55500554797 has 2 divisors, whose sum is σ = 55500554798. Its totient is φ = 55500554796.

The previous prime is 55500554779. The next prime is 55500554803. The reversal of 55500554797 is 79745500555.

It is a happy number.

Together with previous prime (55500554779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47063397481 + 8437157316 = 216941^2 + 91854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55500554797 is a prime.

It is a super-2 number, since 2×55500554797² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55500564797) 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 as a sum of consecutive naturals, namely, 27750277398 + 27750277399.

It is an arithmetic number, because the mean of its divisors is an integer number (27750277399).

Almost surely, 2^55500554797 is an apocalyptic number.

It is an amenable number.

55500554797 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500554797 is an equidigital number, since it uses as much as digits as its factorization.

55500554797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5512500, while the sum is 52.

The spelling of 55500554797 in words is "fifty-five billion, five hundred million, five hundred fifty-four thousand, seven hundred ninety-seven".