1000050550561 has 2 divisors, whose sum is σ = 1000050550562. Its totient is φ = 1000050550560.

The previous prime is 1000050550531. The next prime is 1000050550651. The reversal of 1000050550561 is 1650550500001.

1000050550561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (1000050550651) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 508290573025 + 491759977536 = 712945^2 + 701256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000050550561 - 2¹⁹ = 1000050026273 is a prime.

It is a super-2 number, since 2×1000050550561² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1000050550531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500025275280 + 500025275281.

It is an arithmetic number, because the mean of its divisors is an integer number (500025275281).

Almost surely, 2^{1000050550561} is an apocalyptic number.

It is an amenable number.

1000050550561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000050550561 is an equidigital number, since it uses as much as digits as its factorization.

1000050550561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 1000050550561 in words is "one trillion, fifty million, five hundred fifty thousand, five hundred sixty-one".