5555555497 has 2 divisors, whose sum is σ = 5555555498. Its totient is φ = 5555555496.

The previous prime is 5555555479. The next prime is 5555555501. The reversal of 5555555497 is 7945555555.

Together with previous prime (5555555479) 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., 3024560016 + 2530995481 = 54996^2 + 50309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5555555497 is a prime.

It is not a weakly prime, because it can be changed into another prime (5555558497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777777748 + 2777777749.

It is an arithmetic number, because the mean of its divisors is an integer number (2777777749).

Almost surely, 2^5555555497 is an apocalyptic number.

It is an amenable number.

5555555497 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555555497 is an equidigital number, since it uses as much as digits as its factorization.

5555555497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19687500, while the sum is 55.

The square root of 5555555497 is about 74535.5988571904. The cubic root of 5555555497 is about 1771.0976090819.

The spelling of 5555555497 in words is "five billion, five hundred fifty-five million, five hundred fifty-five thousand, four hundred ninety-seven".