6550364231261 has 2 divisors, whose sum is σ = 6550364231262. Its totient is φ = 6550364231260.

The previous prime is 6550364231237. The next prime is 6550364231309. The reversal of 6550364231261 is 1621324630556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6137416619161 + 412947612100 = 2477381^2 + 642610^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550364231261 - 2⁶ = 6550364231197 is a prime.

It is a super-2 number, since 2×6550364231261² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6550364231461) 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, 3275182115630 + 3275182115631.

It is an arithmetic number, because the mean of its divisors is an integer number (3275182115631).

Almost surely, 2^{6550364231261} is an apocalyptic number.

It is an amenable number.

6550364231261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550364231261 is an equidigital number, since it uses as much as digits as its factorization.

6550364231261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 6550364231261 in words is "six trillion, five hundred fifty billion, three hundred sixty-four million, two hundred thirty-one thousand, two hundred sixty-one".