6450845042861 has 2 divisors, whose sum is σ = 6450845042862. Its totient is φ = 6450845042860.

The previous prime is 6450845042857. The next prime is 6450845042927. The reversal of 6450845042861 is 1682405480546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6200194620361 + 250650422500 = 2490019^2 + 500650^2 .

It is a cyclic number.

It is not a de Polignac number, because 6450845042861 - 2² = 6450845042857 is a prime.

It is a super-2 number, since 2×6450845042861² (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 (6450845042801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225422521430 + 3225422521431.

It is an arithmetic number, because the mean of its divisors is an integer number (3225422521431).

Almost surely, 2^{6450845042861} is an apocalyptic number.

It is an amenable number.

6450845042861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6450845042861 is an equidigital number, since it uses as much as digits as its factorization.

6450845042861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7372800, while the sum is 53.

The spelling of 6450845042861 in words is "six trillion, four hundred fifty billion, eight hundred forty-five million, forty-two thousand, eight hundred sixty-one".