505213125077 has 2 divisors, whose sum is σ = 505213125078. Its totient is φ = 505213125076.

The previous prime is 505213124957. The next prime is 505213125097. The reversal of 505213125077 is 770521312505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387828772081 + 117384352996 = 622759^2 + 342614^2 .

It is a cyclic number.

It is not a de Polignac number, because 505213125077 - 2²⁴ = 505196347861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505213125077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505213125097) 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, 252606562538 + 252606562539.

It is an arithmetic number, because the mean of its divisors is an integer number (252606562539).

Almost surely, 2^505213125077 is an apocalyptic number.

It is an amenable number.

505213125077 is a deficient number, since it is larger than the sum of its proper divisors (1).

505213125077 is an equidigital number, since it uses as much as digits as its factorization.

505213125077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 505213125077 in words is "five hundred five billion, two hundred thirteen million, one hundred twenty-five thousand, seventy-seven".