854044262453821 has 8 divisors (see below), whose sum is σ = 854544267775800. Its totient is φ = 853544396052480.

The previous prime is 854044262453797. The next prime is 854044262453857. The reversal of 854044262453821 is 128354262440458.

It can be written as a sum of positive squares in 4 ways, for example, as 41874630465721 + 812169631988100 = 6471061^2 + 28498590^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 854044262453821 - 2²³ = 854044254065213 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 (854044262453861) 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, 22429860 + ... + 47023261.

It is an arithmetic number, because the mean of its divisors is an integer number (106818033471975).

Almost surely, 2^{854044262453821} is an apocalyptic number.

It is an amenable number.

854044262453821 is a deficient number, since it is larger than the sum of its proper divisors (500005321979).

854044262453821 is a wasteful number, since it uses less digits than its factorization.

854044262453821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69460319.

The product of its (nonzero) digits is 58982400, while the sum is 58.

The spelling of 854044262453821 in words is "eight hundred fifty-four trillion, forty-four billion, two hundred sixty-two million, four hundred fifty-three thousand, eight hundred twenty-one".