845938090849 has 2 divisors, whose sum is σ = 845938090850. Its totient is φ = 845938090848.

The previous prime is 845938090843. The next prime is 845938090861. The reversal of 845938090849 is 948090839548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811698289249 + 34239801600 = 900943^2 + 185040^2 .

It is a cyclic number.

It is not a de Polignac number, because 845938090849 - 2²¹ = 845935993697 is a prime.

It is a super-2 number, since 2×845938090849² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (845938090843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422969045424 + 422969045425.

It is an arithmetic number, because the mean of its divisors is an integer number (422969045425).

Almost surely, 2^845938090849 is an apocalyptic number.

It is an amenable number.

845938090849 is a deficient number, since it is larger than the sum of its proper divisors (1).

845938090849 is an equidigital number, since it uses as much as digits as its factorization.

845938090849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 845938090849 in words is "eight hundred forty-five billion, nine hundred thirty-eight million, ninety thousand, eight hundred forty-nine".