505300513561 has 2 divisors, whose sum is σ = 505300513562. Its totient is φ = 505300513560.

The previous prime is 505300513537. The next prime is 505300513609. The reversal of 505300513561 is 165315003505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312771747600 + 192528765961 = 559260^2 + 438781^2 .

It is a cyclic number.

It is not a de Polignac number, because 505300513561 - 2²⁷ = 505166295833 is a prime.

It is not a weakly prime, because it can be changed into another prime (505300583561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252650256780 + 252650256781.

It is an arithmetic number, because the mean of its divisors is an integer number (252650256781).

Almost surely, 2^505300513561 is an apocalyptic number.

It is an amenable number.

505300513561 is a deficient number, since it is larger than the sum of its proper divisors (1).

505300513561 is an equidigital number, since it uses as much as digits as its factorization.

505300513561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 34.

The spelling of 505300513561 in words is "five hundred five billion, three hundred million, five hundred thirteen thousand, five hundred sixty-one".