805583082749 has 4 divisors (see below), whose sum is σ = 807708632160. Its totient is φ = 803457533340.

The previous prime is 805583082743. The next prime is 805583082763. The reversal of 805583082749 is 947280385508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805583082749 is a prime.

It is a super-2 number, since 2×805583082749² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805583082743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062774137 + ... + 1062774894.

It is an arithmetic number, because the mean of its divisors is an integer number (201927158040).

Almost surely, 2^805583082749 is an apocalyptic number.

It is an amenable number.

805583082749 is a deficient number, since it is larger than the sum of its proper divisors (2125549411).

805583082749 is a wasteful number, since it uses less digits than its factorization.

805583082749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125549410.

The product of its (nonzero) digits is 19353600, while the sum is 59.

The spelling of 805583082749 in words is "eight hundred five billion, five hundred eighty-three million, eighty-two thousand, seven hundred forty-nine".