505000549961 has 2 divisors, whose sum is σ = 505000549962. Its totient is φ = 505000549960.

The previous prime is 505000549957. The next prime is 505000550011. The reversal of 505000549961 is 169945000505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416565685561 + 88434864400 = 645419^2 + 297380^2 .

It is a cyclic number.

It is not a de Polignac number, because 505000549961 - 2² = 505000549957 is a prime.

It is not a weakly prime, because it can be changed into another prime (505000549901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252500274980 + 252500274981.

It is an arithmetic number, because the mean of its divisors is an integer number (252500274981).

Almost surely, 2^505000549961 is an apocalyptic number.

It is an amenable number.

505000549961 is a deficient number, since it is larger than the sum of its proper divisors (1).

505000549961 is an equidigital number, since it uses as much as digits as its factorization.

505000549961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 44.

The spelling of 505000549961 in words is "five hundred five billion, five hundred forty-nine thousand, nine hundred sixty-one".