505123312149949 has 2 divisors, whose sum is σ = 505123312149950. Its totient is φ = 505123312149948.

The previous prime is 505123312149917. The next prime is 505123312150007. The reversal of 505123312149949 is 949941213321505.

It is an a-pointer prime, because the next prime (505123312150007) can be obtained adding 505123312149949 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492984310562500 + 12139001587449 = 22203250^2 + 3484107^2 .

It is a cyclic number.

It is not a de Polignac number, because 505123312149949 - 2⁵ = 505123312149917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505123312149893 and 505123312149902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505123312749949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252561656074974 + 252561656074975.

It is an arithmetic number, because the mean of its divisors is an integer number (252561656074975).

Almost surely, 2^{505123312149949} is an apocalyptic number.

It is an amenable number.

505123312149949 is a deficient number, since it is larger than the sum of its proper divisors (1).

505123312149949 is an equidigital number, since it uses as much as digits as its factorization.

505123312149949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 505123312149949 in words is "five hundred five trillion, one hundred twenty-three billion, three hundred twelve million, one hundred forty-nine thousand, nine hundred forty-nine".