505540045553 has 2 divisors, whose sum is σ = 505540045554. Its totient is φ = 505540045552.

The previous prime is 505540045499. The next prime is 505540045567. The reversal of 505540045553 is 355540045505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380569311409 + 124970734144 = 616903^2 + 353512^2 .

It is a cyclic number.

It is not a de Polignac number, because 505540045553 - 2²⁸ = 505271610097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505540045553.

It is not a weakly prime, because it can be changed into another prime (505540045453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252770022776 + 252770022777.

It is an arithmetic number, because the mean of its divisors is an integer number (252770022777).

Almost surely, 2^505540045553 is an apocalyptic number.

It is an amenable number.

505540045553 is a deficient number, since it is larger than the sum of its proper divisors (1).

505540045553 is an equidigital number, since it uses as much as digits as its factorization.

505540045553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750000, while the sum is 41.

The spelling of 505540045553 in words is "five hundred five billion, five hundred forty million, forty-five thousand, five hundred fifty-three".