791854858989 has 12 divisors (see below), whose sum is σ = 1143799793500. Its totient is φ = 527898881664.

The previous prime is 791854858973. The next prime is 791854859011. The reversal of 791854858989 is 989858458197.

791854858989 is a `hidden beast` number, since 7 + 9 + 18 + 548 + 58 + 9 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 514889483364 + 276965375625 = 717558^2 + 526275^2 .

It is not a de Polignac number, because 791854858989 - 2⁴ = 791854858973 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 (791854858939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1096527 + ... + 1669155.

Almost surely, 2^791854858989 is an apocalyptic number.

It is an amenable number.

791854858989 is a deficient number, since it is larger than the sum of its proper divisors (351944934511).

791854858989 is a wasteful number, since it uses less digits than its factorization.

791854858989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726284 (or 726281 counting only the distinct ones).

The product of its digits is 2090188800, while the sum is 81.

The spelling of 791854858989 in words is "seven hundred ninety-one billion, eight hundred fifty-four million, eight hundred fifty-eight thousand, nine hundred eighty-nine".