73321108256861 has 2 divisors, whose sum is σ = 73321108256862. Its totient is φ = 73321108256860.

The previous prime is 73321108256843. The next prime is 73321108256863. The reversal of 73321108256861 is 16865280112337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66004656705625 + 7316451551236 = 8124325^2 + 2704894^2 .

It is a cyclic number.

It is not a de Polignac number, because 73321108256861 - 2⁶ = 73321108256797 is a prime.

It is a super-3 number, since 3×73321108256861³ (a number of 43 digits) contains 333 as substring.

Together with 73321108256863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73321108256863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36660554128430 + 36660554128431.

It is an arithmetic number, because the mean of its divisors is an integer number (36660554128431).

Almost surely, 2^{73321108256861} is an apocalyptic number.

It is an amenable number.

73321108256861 is a deficient number, since it is larger than the sum of its proper divisors (1).

73321108256861 is an equidigital number, since it uses as much as digits as its factorization.

73321108256861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 73321108256861 in words is "seventy-three trillion, three hundred twenty-one billion, one hundred eight million, two hundred fifty-six thousand, eight hundred sixty-one".