56814661221 has 8 divisors (see below), whose sum is σ = 78365050080. Its totient is φ = 36570356592.

The previous prime is 56814661207. The next prime is 56814661243. The reversal of 56814661221 is 12216641865.

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

It is not a de Polignac number, because 56814661221 - 2¹⁴ = 56814644837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56814661261) 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, 326520955 + ... + 326521128.

It is an arithmetic number, because the mean of its divisors is an integer number (9795631260).

Almost surely, 2^56814661221 is an apocalyptic number.

It is an amenable number.

56814661221 is a deficient number, since it is larger than the sum of its proper divisors (21550388859).

56814661221 is a wasteful number, since it uses less digits than its factorization.

56814661221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653042115.

The product of its digits is 138240, while the sum is 42.

The spelling of 56814661221 in words is "fifty-six billion, eight hundred fourteen million, six hundred sixty-one thousand, two hundred twenty-one".