505556000977 has 2 divisors, whose sum is σ = 505556000978. Its totient is φ = 505556000976.

The previous prime is 505556000933. The next prime is 505556001023. The reversal of 505556000977 is 779000655505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415613591761 + 89942409216 = 644681^2 + 299904^2 .

It is a cyclic number.

It is not a de Polignac number, because 505556000977 - 2²³ = 505547612369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505556000977.

It is not a weakly prime, because it can be changed into another prime (505556000927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252778000488 + 252778000489.

It is an arithmetic number, because the mean of its divisors is an integer number (252778000489).

Almost surely, 2^505556000977 is an apocalyptic number.

It is an amenable number.

505556000977 is a deficient number, since it is larger than the sum of its proper divisors (1).

505556000977 is an equidigital number, since it uses as much as digits as its factorization.

505556000977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653750, while the sum is 49.

The spelling of 505556000977 in words is "five hundred five billion, five hundred fifty-six million, nine hundred seventy-seven", and thus it is an aban number.