554999997557 has 2 divisors, whose sum is σ = 554999997558. Its totient is φ = 554999997556.

The previous prime is 554999997491. The next prime is 554999997569. The reversal of 554999997557 is 755799999455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554181980356 + 818017201 = 744434^2 + 28601^2 .

It is a cyclic number.

It is not a de Polignac number, because 554999997557 - 2⁸ = 554999997301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554999997257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277499998778 + 277499998779.

It is an arithmetic number, because the mean of its divisors is an integer number (277499998779).

Almost surely, 2^554999997557 is an apocalyptic number.

It is an amenable number.

554999997557 is a deficient number, since it is larger than the sum of its proper divisors (1).

554999997557 is an equidigital number, since it uses as much as digits as its factorization.

554999997557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7233502500, while the sum is 83.

The spelling of 554999997557 in words is "five hundred fifty-four billion, nine hundred ninety-nine million, nine hundred ninety-seven thousand, five hundred fifty-seven".