56043933721 has 2 divisors, whose sum is σ = 56043933722. Its totient is φ = 56043933720.

The previous prime is 56043933653. The next prime is 56043933809. The reversal of 56043933721 is 12733934065.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56043933696 + 25 = 236736^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 56043933721 - 2¹⁷ = 56043802649 is a prime.

It is not a weakly prime, because it can be changed into another prime (56043933821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28021966860 + 28021966861.

It is an arithmetic number, because the mean of its divisors is an integer number (28021966861).

Almost surely, 2^56043933721 is an apocalyptic number.

It is an amenable number.

56043933721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56043933721 is an equidigital number, since it uses as much as digits as its factorization.

56043933721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 56043933721 in words is "fifty-six billion, forty-three million, nine hundred thirty-three thousand, seven hundred twenty-one".