505363040261 has 2 divisors, whose sum is σ = 505363040262. Its totient is φ = 505363040260.

The previous prime is 505363040243. The next prime is 505363040279. The reversal of 505363040261 is 162040363505.

It is a balanced prime because it is at equal distance from previous prime (505363040243) and next prime (505363040279).

It can be written as a sum of positive squares in only one way, i.e., 308142671236 + 197220369025 = 555106^2 + 444095^2 .

It is a cyclic number.

It is not a de Polignac number, because 505363040261 - 2⁶ = 505363040197 is a prime.

It is a super-2 number, since 2×505363040261² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505363040291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252681520130 + 252681520131.

It is an arithmetic number, because the mean of its divisors is an integer number (252681520131).

Almost surely, 2^505363040261 is an apocalyptic number.

It is an amenable number.

505363040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

505363040261 is an equidigital number, since it uses as much as digits as its factorization.

505363040261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 505363040261 in words is "five hundred five billion, three hundred sixty-three million, forty thousand, two hundred sixty-one".