845852136991 has 2 divisors, whose sum is σ = 845852136992. Its totient is φ = 845852136990.

The previous prime is 845852136973. The next prime is 845852137027. The reversal of 845852136991 is 199631258548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845852136991 - 2²⁵ = 845818582559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845852136191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422926068495 + 422926068496.

It is an arithmetic number, because the mean of its divisors is an integer number (422926068496).

Almost surely, 2^845852136991 is an apocalyptic number.

845852136991 is a deficient number, since it is larger than the sum of its proper divisors (1).

845852136991 is an equidigital number, since it uses as much as digits as its factorization.

845852136991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 61.

The spelling of 845852136991 in words is "eight hundred forty-five billion, eight hundred fifty-two million, one hundred thirty-six thousand, nine hundred ninety-one".