793786556809 has 9 divisors (see below), whose sum is σ = 795474919143. Its totient is φ = 792101776032.

The previous prime is 793786556749. The next prime is 793786556813. The reversal of 793786556809 is 908655687397.

The square root of 793786556809 is 890947.

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., 243637998409 + 550148558400 = 493597^2 + 741720^2 .

It is not a de Polignac number, because 793786556809 - 2⁷ = 793786556681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (793786556869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 786705697 + ... + 786706705.

It is an arithmetic number, because the mean of its divisors is an integer number (88386102127).

Almost surely, 2^793786556809 is an apocalyptic number.

793786556809 is the 890947-th square number.

793786556809 is the 445474-th centered octagonal number.

It is an amenable number.

793786556809 is a deficient number, since it is larger than the sum of its proper divisors (1688362334).

793786556809 is an frugal number, since it uses more digits than its factorization.

793786556809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 685843200, while the sum is 73.

The spelling of 793786556809 in words is "seven hundred ninety-three billion, seven hundred eighty-six million, five hundred fifty-six thousand, eight hundred nine".