56840437821 has 8 divisors (see below), whose sum is σ = 77549744800. Its totient is φ = 37012378032.

The previous prime is 56840437817. The next prime is 56840437847. The reversal of 56840437821 is 12873404865.

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

It is not a de Polignac number, because 56840437821 - 2² = 56840437817 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 (56840437861) 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 7 ways as a sum of consecutive naturals, for example, 220311646 + ... + 220311903.

It is an arithmetic number, because the mean of its divisors is an integer number (9693718100).

Almost surely, 2^56840437821 is an apocalyptic number.

It is an amenable number.

56840437821 is a deficient number, since it is larger than the sum of its proper divisors (20709306979).

56840437821 is a wasteful number, since it uses less digits than its factorization.

56840437821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440623595.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 56840437821 in words is "fifty-six billion, eight hundred forty million, four hundred thirty-seven thousand, eight hundred twenty-one".