804531859849 has 27 divisors (see below), whose sum is σ = 835981854823. Its totient is φ = 774253282400.

The previous prime is 804531859841. The next prime is 804531859853. The reversal of 804531859849 is 948958135408.

It is a happy number.

The square root of 804531859849 is 896957.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 38766853449 + 765765006400 = 196893^2 + 875080^2 .

It is not a de Polignac number, because 804531859849 - 2³ = 804531859841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804531859841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4817555964 + ... + 4817556130.

Almost surely, 2^804531859849 is an apocalyptic number.

804531859849 is the 896957-th square number.

804531859849 is the 448479-th centered octagonal number.

It is an amenable number.

804531859849 is a deficient number, since it is larger than the sum of its proper divisors (31449994974).

804531859849 is an frugal number, since it uses more digits than its factorization.

804531859849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 64.

Multiplying 804531859849 by its sum of digits (64), we get a square (51490039030336 = 7175656²).

The spelling of 804531859849 in words is "eight hundred four billion, five hundred thirty-one million, eight hundred fifty-nine thousand, eight hundred forty-nine".