845971671133 has 2 divisors, whose sum is σ = 845971671134. Its totient is φ = 845971671132.

The previous prime is 845971671119. The next prime is 845971671137. The reversal of 845971671133 is 331176179548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637183904644 + 208787766489 = 798238^2 + 456933^2 .

It is a cyclic number.

It is not a de Polignac number, because 845971671133 - 2²⁵ = 845938116701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845971671137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422985835566 + 422985835567.

It is an arithmetic number, because the mean of its divisors is an integer number (422985835567).

Almost surely, 2^845971671133 is an apocalyptic number.

It is an amenable number.

845971671133 is a deficient number, since it is larger than the sum of its proper divisors (1).

845971671133 is an equidigital number, since it uses as much as digits as its factorization.

845971671133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 55.

The spelling of 845971671133 in words is "eight hundred forty-five billion, nine hundred seventy-one million, six hundred seventy-one thousand, one hundred thirty-three".