845204356999 has 2 divisors, whose sum is σ = 845204357000. Its totient is φ = 845204356998.

The previous prime is 845204356993. The next prime is 845204357009. The reversal of 845204356999 is 999653402548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845204356999 - 2⁹ = 845204356487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 845204356999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845204356993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422602178499 + 422602178500.

It is an arithmetic number, because the mean of its divisors is an integer number (422602178500).

Almost surely, 2^845204356999 is an apocalyptic number.

845204356999 is a deficient number, since it is larger than the sum of its proper divisors (1).

845204356999 is an equidigital number, since it uses as much as digits as its factorization.

845204356999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 83980800, while the sum is 64.

The spelling of 845204356999 in words is "eight hundred forty-five billion, two hundred four million, three hundred fifty-six thousand, nine hundred ninety-nine".