845481091 has 16 divisors (see below), whose sum is σ = 1044578304. Its totient is φ = 666389664.

The previous prime is 845481089. The next prime is 845481097. The reversal of 845481091 is 190184548.

It is a cyclic number.

It is not a de Polignac number, because 845481091 - 2¹ = 845481089 is a prime.

It is a super-3 number, since 3×845481091³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (845481097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6270 + ... + 41596.

It is an arithmetic number, because the mean of its divisors is an integer number (65286144).

Almost surely, 2^845481091 is an apocalyptic number.

845481091 is a deficient number, since it is larger than the sum of its proper divisors (199097213).

845481091 is a wasteful number, since it uses less digits than its factorization.

845481091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35610.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 845481091 is about 29077.1575467754. The cubic root of 845481091 is about 945.5865794516.

The spelling of 845481091 in words is "eight hundred forty-five million, four hundred eighty-one thousand, ninety-one".