791855853126839 has 4 divisors (see below), whose sum is σ = 833532476975640. Its totient is φ = 750179229278040.

The previous prime is 791855853126787. The next prime is 791855853126847. The reversal of 791855853126839 is 938621358558197.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 791855853126839 - 2³⁶ = 791787133650103 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 (791855853122839) 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, 20838311924372 + ... + 20838311924409.

It is an arithmetic number, because the mean of its divisors is an integer number (208383119243910).

Almost surely, 2^{791855853126839} is an apocalyptic number.

791855853126839 is a deficient number, since it is larger than the sum of its proper divisors (41676623848801).

791855853126839 is a wasteful number, since it uses less digits than its factorization.

791855853126839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41676623848800.

The product of its digits is 3919104000, while the sum is 80.

The spelling of 791855853126839 in words is "seven hundred ninety-one trillion, eight hundred fifty-five billion, eight hundred fifty-three million, one hundred twenty-six thousand, eight hundred thirty-nine".