845263861 has 16 divisors (see below), whose sum is σ = 924895216. Its totient is φ = 767771136.

The previous prime is 845263847. The next prime is 845263877. The reversal of 845263861 is 168362548.

It can be written as a sum of positive squares in 8 ways, for example, as 37283236 + 807980625 = 6106^2 + 28425^2 .

It is a cyclic number.

It is not a de Polignac number, because 845263861 - 2¹³ = 845255669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845263801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581011 + ... + 582463.

It is an arithmetic number, because the mean of its divisors is an integer number (57805951).

Almost surely, 2^845263861 is an apocalyptic number.

It is an amenable number.

845263861 is a deficient number, since it is larger than the sum of its proper divisors (79631355).

845263861 is a wasteful number, since it uses less digits than its factorization.

845263861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152.

The product of its digits is 276480, while the sum is 43.

The square root of 845263861 is about 29073.4219004231. The cubic root of 845263861 is about 945.5055891257.

The spelling of 845263861 in words is "eight hundred forty-five million, two hundred sixty-three thousand, eight hundred sixty-one".