805836825021 has 8 divisors (see below), whose sum is σ = 1109108748544. Its totient is φ = 519894725760.

The previous prime is 805836824999. The next prime is 805836825097. The reversal of 805836825021 is 120528638508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 805836825021 - 2²⁷ = 805702607293 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 (805836825121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4332455956 + ... + 4332456141.

It is an arithmetic number, because the mean of its divisors is an integer number (138638593568).

Almost surely, 2^805836825021 is an apocalyptic number.

It is an amenable number.

805836825021 is a deficient number, since it is larger than the sum of its proper divisors (303271923523).

805836825021 is a wasteful number, since it uses less digits than its factorization.

805836825021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664912131.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 805836825021 in words is "eight hundred five billion, eight hundred thirty-six million, eight hundred twenty-five thousand, twenty-one".