56802201721 has 8 divisors (see below), whose sum is σ = 57067654280. Its totient is φ = 56536900992.

The previous prime is 56802201713. The next prime is 56802201727. The reversal of 56802201721 is 12710220865.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13488267321 + 43313934400 = 116139^2 + 208120^2 .

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 56802201721 - 2³ = 56802201713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56802201727) 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, 750031 + ... + 822283.

It is an arithmetic number, because the mean of its divisors is an integer number (7133456785).

Almost surely, 2^56802201721 is an apocalyptic number.

It is an amenable number.

56802201721 is a deficient number, since it is larger than the sum of its proper divisors (265452559).

56802201721 is a wasteful number, since it uses less digits than its factorization.

56802201721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75915.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 56802201721 in words is "fifty-six billion, eight hundred two million, two hundred one thousand, seven hundred twenty-one".