71804814445673 has 2 divisors, whose sum is σ = 71804814445674. Its totient is φ = 71804814445672.

The previous prime is 71804814445649. The next prime is 71804814445691. The reversal of 71804814445673 is 37654441840817.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71676999615529 + 127814830144 = 8466227^2 + 357512^2 .

It is an emirp because it is prime and its reverse (37654441840817) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71804814445673 is a prime.

It is not a weakly prime, because it can be changed into another prime (71804814441673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35902407222836 + 35902407222837.

It is an arithmetic number, because the mean of its divisors is an integer number (35902407222837).

Almost surely, 2^{71804814445673} is an apocalyptic number.

It is an amenable number.

71804814445673 is a deficient number, since it is larger than the sum of its proper divisors (1).

71804814445673 is an equidigital number, since it uses as much as digits as its factorization.

71804814445673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72253440, while the sum is 62.

The spelling of 71804814445673 in words is "seventy-one trillion, eight hundred four billion, eight hundred fourteen million, four hundred forty-five thousand, six hundred seventy-three".