805149084601 has 3 divisors (see below), whose sum is σ = 805149981903. Its totient is φ = 805148187300.

The previous prime is 805149084587. The next prime is 805149084613. The reversal of 805149084601 is 106480941508.

The square root of 805149084601 is 897301.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3013900201 + 802135184400 = 54899^2 + 895620^2 .

It is not a de Polignac number, because 805149084601 - 2¹⁷ = 805148953529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805149084661) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 448651 + ... + 1345951.

It is an arithmetic number, because the mean of its divisors is an integer number (268383327301).

Almost surely, 2^805149084601 is an apocalyptic number.

805149084601 is the 897301-st square number.

805149084601 is the 448651-st centered octagonal number.

It is an amenable number.

805149084601 is a deficient number, since it is larger than the sum of its proper divisors (897302).

805149084601 is an frugal number, since it uses more digits than its factorization.

805149084601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794602 (or 897301 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 805149084601 in words is "eight hundred five billion, one hundred forty-nine million, eighty-four thousand, six hundred one".